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Hi,
I'm planning on buying a Desire HD, but just curious about battery life before I lay down a grand on it.
At the moment I have an HTC Hero, when they were in their heyday many people complained about the short life on them. I can get 2 days out of mine, with syncing over wifi enabled the whole time. I put the complaints down to people with background apps sucking CPU or too much twitter/facebook/whatever crap syncing as well.
Now most of the reports of poor Desire HD battery I life are from people on their first charge (who clearly don't understand the characteristics of Li-ion batteries), people who expect to be able to thrash the phone all day with the screen on without it dying and generally people who just don't sound like they know what they're talking about.
I know there are two bugs which peg the CPU at 100%, the one fixed by having debugging on and the calendar bug, which sounds like it can be fixed by clearing calendar data or leaving syncing off. I think these were affecting some of the people who were complaining about the short battery life.
So my question for Desire HD owners is, can you last at least 6 am till 10 pm with a bit of use (something like 10 min browsing, 20 min IM, email syncing all day, 1 hr music, 20 min calls) without it dying? Currently my Hero does this fine and a full day without a charge is a requirement for me.
Thanks.
Yes, if you set it up correctly. From your post it sounds like you know what your doing when setting it up.
Before i tried the battery calibration i was getting from 8am to 9pm with moderate usage. TBH i was put off by using it as I thought it would just die on me too soon.
After the calibration (search forum for it) i got from 8am to 4pm the following day where the 15% warning hit. So do the calibration and you'll be as happy as i now am with it. I never got my iPhone 4 to last that long!
Thanks for the info guys, exactly what I wanted to hear!
I haven't taken any precautions to save battery life and I am getting 25-26 hours on a full charge...and now having had the phone for 2-3 weeks it seems to be getting even better!! I've been getting 36 hours out of a full charge these past 3 days.
I do not turn wifi off. I have screen brightness on auto. Syncing lots of stuff hourly (even weather!). I use 3g when I go out but this is about 2-3 hours tops on week days cause I have wifi everywhere i go. battery life has never been an issue for me and I use my phone frequently...play games for 20-30 mins. watch videos via. skynews, listen to some music etc. etc.
As for the bugs...I do not have usb debugging turned on and I have never had the /INIT problem...perhaps it was fixed in the last update? and the calender bug...never had that problem either and I use my calander with google calander, facebook, holidays and person agenda.
I think you'll easily last a day with the usage you mention. As a rule, I think you normally get up to 4 hours display on usage off a charge (browsing, messaging, watching vids etc).
I'm travelling from Ireland to NZ on Monday, which will equate to 36 hours travelling with probably no access to a charge, and lots of time spent sitting around using my dhd. There's no way the phone will last right through, so have bought a 5000mAh USB battery pack for £20.
Sent from my Desire HD using XDA App
Might be useful to you -
http://hemorrdroids.net/battery-calibration/
http://hemorrdroids.net/htc-desire-hd-battery-life/
I'm currently at 22 hours and still at 42%.
I get 2 to 4 hours depending on useage from full charge. 8 - 9 hours if left on standby and not used for anything.
Sent from my Desire HD using XDA App
AndyCr15 said:
I'm currently at 22 hours and still at 42%.
Click to expand...
Click to collapse
I'd be interested to know what kind of usage that's with?
xspyda said:
I'd be interested to know what kind of usage that's with?
Click to expand...
Click to collapse
Well...I think I have had similar results....
flash one of the custom roms, with one of the OCUV kernels and setting max. speed to one of the UV speeds (mine is set to 1.1 Ghz which is UV 50mV), also setup useful profiles in Setcpu (I have set screen-off to use max 384 mhz - which does cause a 1-3 sec lag when screen is on again) and <20% battery etc...
of course, if you play heavily with your dhd you will not get these results, so you can put wifi on with this , but need to think of what you want to do, because using your DHD for 2 days, does require limited screen usage (imho, this uses a lot of battery)
l0w said:
I get 2 to 4 hours depending on useage from full charge. 8 - 9 hours if left on standby and not used for anything.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
8-9 hours on standby???????????
even 2-4 hours whilst using it is terrible!!! When I got my HD and unpacked it I didn't put it down after a full charge and I got 8 and a half hours with non-stop heavy use.
I think you have a faulty battery!!
jbrizz said:
Hi,
At the moment I have an HTC Hero, when they were in their heyday many people complained about the short life on them. I can get 2 days out of mine, with syncing over wifi enabled the whole time. I put the complaints down to people with background apps sucking CPU or too much twitter/facebook/whatever crap syncing as well.
.
.
.
Click to expand...
Click to collapse
I too moved from a Hero to a DHD and I can say that with similar usage, the DHD loses to the Hero by a decent margin..maybe u might get a couple of hours less of usage compared to the Hero but the difference isn't very drastic
Moreover on the Hero I'm using CM6.1 Froyo overclocked and the DHD is on Sense, so logically speaking the Hero should get slightly better battery life on CM6.1 compared to Sense. I'm sure after rooting and flashing CM6.1 and undervolting/underclock the DHD, i'd get better battery life because the DHD is like much much faster than the Hero, so I'm sure even if i underclock it, it'll still be super fast.
ccart said:
8-9 hours on standby???????????
even 2-4 hours whilst using it is terrible!!! When I got my HD and unpacked it I didn't put it down after a full charge and I got 8 and a half hours with non-stop heavy use.
I think you have a faulty battery!!
Click to expand...
Click to collapse
The battery is 'fine' i'm using current widget to track and its performing to around 1100 mah which is not too far below spec. The problem is the current draw. In use i'm drawing 500 to 800 mA and in standby around 80 to 300 mA. These figures are consistent with the battery life I'm seeing and the battery working close to spec (1230mAh i think?)
There are lots of bundled apps like Maps running all the time in standby drawing current and I haven't yet figured out how to stop them. Stopping them with task manager just sees them restart with even bigger current draw.
Sent from my Desire HD using XDA App
Something is definitely wrong (as I'm sure you're aware) with only 9 hours on standby.
Out of interest, remove ALL widgets and see what difference it makes. Also, give us an example of what processes are running?
I would get rid of all task killers and also anything monitoring your system. Those themselves can draw more than you think.
l0w said:
The battery is 'fine' i'm using current widget to track and its performing to around 1100 mah which is not too far below spec. The problem is the current draw. In use i'm drawing 500 to 800 mA and in standby around 80 to 300 mA. These figures are consistent with the battery life I'm seeing and the battery working close to spec (1230mAh i think?)
There are lots of bundled apps like Maps running all the time in standby drawing current and I haven't yet figured out how to stop them. Stopping them with task manager just sees them restart with even bigger current draw.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
wow well I'm no battery expert but it really sounds like something is not right there. I don't have any battery drain from apps in standby and I do use maps.
I got 1 day and 16 hours from a full charge today (just put it back on charge now).
Thats with wifi on for 31 hours (always on, doesnt sleep when the screen locks), 1 hour and 24 mins of talk time and the screen on for 4 hours and 5 mins.
l0w said:
The battery is 'fine' i'm using current widget to track and its performing to around 1100 mah which is not too far below spec. The problem is the current draw. In use i'm drawing 500 to 800 mA and in standby around 80 to 300 mA. These figures are consistent with the battery life I'm seeing and the battery working close to spec (1230mAh i think?)
There are lots of bundled apps like Maps running all the time in standby drawing current and I haven't yet figured out how to stop them. Stopping them with task manager just sees them restart with even bigger current draw.
Sent from my Desire HD using XDA App
Click to expand...
Click to collapse
thats definitely wrong somehow.. should never drain that much, perhaps it is because you let currentwidget drain it all the time
(na dont know why it is like that but it definitely is way too high)
official firmware, medium screen brightness, default sync widgets
heavy use: 12-15 hours
light use: 24 to 36 hours
this is how its been for me ever since the battery calibrated, needs around a week or use the battery calibration trick
I too have just moved from a Hero (running VillainRom 12) to the DHD (stock Sense over FroYo) and even though I have only had it a week, the battery easily lasts a whole day with the moderate use you describe. Unless I get stuck into a session of " Angry Birds ", which seems to kill the battery pretty fast. But ABs had the same affect on my Hero. Constant screen time on that beautiful 4.3" display sucks the battery. I find the same thing when using the DHD as an in-car gps. The warmth of the back of the case is testament to how much energy has been expended. So I connect to the car charger now. I have also bought a portable backup battery (plugs into the microUSB) just in case.
I don't regret spending NZD1000 on the DHD. My son is looking forward to inheriting the Hero.
Well I charged it up overnight when I got it, my first full day was today and I got 7 am till 8:30 pm using it almost constantly (quiet day at work). I don't know how people can run them flat a day with normal use. And I know it'll improve a lot after a few charge cycles.
It doesn't look like it's going to be much worse than my Hero.
Thanks for all the advice. I uninstalled all widgets and it improved a little. But still things like maps/maps sync were constantly burning juice and no way of stopping them running.
I installed Launcher Pro and can report that my battery life has approximately doubled. Typically i was getting 4 - 6 hrs use and sometimes only 2 (light use). Now getting between 8 and 12 hours of fairly heavy use. Its still not up to some of the figures others are reporting but Launcher Pro has helped a lot as all those constantly running apps that were draining my battery just dont start themselves up any more!
Sent from my Desire HD using XDA App
For me, with Overclock.. it's EXCELLENT! I can have it in standby but still have background data going (push gmail, twitter apps, etc.) for days at a time and still have some juice left.
Just today with some admittedly light usage (but I did use it) I had battery use time of 12Hrs with over 70% left.
I'm using setvsel @
35 @ 400MHz
50 @ 800MHz
65 @ 1200MHz
CPU Icon is set to refresh every second and it's supposed to cap at Vsel 2 @ 10%. It's as stable as ever.. been running like this for weeks now. I'm taking note of how much I appreciate the excellent battery life I get because my Vibrant has been getting really bad lately.
Running Barebones 1.3 with
19 @ 300Mhz
35 @ 600MHz
52 @ 1000Mhz
Battery Life is excellent - more than 48h without recharging is no problem.
I get 2 days of standby with heavy texting,surfing over wifi,calling and some gaming. DEFY battery performance is one the best amongst all Android phones.
el*Loco said:
Running Barebones 1.3 with
19 @ 300Mhz
35 @ 600MHz
52 @ 1000Mhz
Battery Life is excellent - more than 48h without recharging is no problem.
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Click to collapse
Undervolting your cpu can harm your hardware real badly. I've had my defy stopped working and shut down completely in the past so i won't recommend you OC or UV
EDIT: tho i still undervolt but 19 vsel is too low for 300 mhz, raise it upto 26 or so
Yes, 19 vsel maybe too low, at least in my case. When I ran the stability test, anything less than 24 would hang the phone after some 10 minutes. 24 is fine in my case but I set it at 26 to give a little more juice.
LOL. Why the hell, should undervolting harm the cpu? Undervolting improves your cpu's lifetime, instead! Less voltage means less stress (heat) and less leak currents for the cpu.
Well, it's true that you might have some instability issues, when the voltage is too low. As soon as you experience so, you can raise the voltage a little, until you have a stable cpu. I've been using undervolting for my PC's CPUs for several years.
PS: I'm on [email protected], [email protected], [email protected]
Never had any problems with my settings, some in this forum use even lower voltages.
mine is
[email protected]
[email protected]
[email protected]
I use wifi quite a lot. But still the battery backup is ok compared to my previous phones!
Running on Pays 5.0
[email protected]
[email protected]
[email protected]
I have to charge every two days.
running on pay 3.1
setvsel:
350/22
700/38
1100/56
48h no problem, record is 80h on moderate use
The battery life on the Defy is absolutely amazing.
I can easily get between 2 and 3 days of normal usage and somewhere in the region of 4-5 if I use it very little.
I reckon if I switched off 3G, had the brightness down as low as possible and generally tried not to use the phone much, I could push a week.
Sadly, my Defy is 'in the shop' just now, damned earpiece.
What do you guys run on the background? I probably able to get 1.5 days on normal usage. Even after charging and no usage, I lose about 10 % after an hour or so.
lanfearxt said:
What do you guys run on the background? I probably able to get 1.5 days on normal usage. Even after charging and no usage, I lose about 10 % after an hour or so.
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Click to collapse
It is impossible to get 1.5 day if defy uses 10% for 1 hour standby. Defy rounds 95% to 100%, and 94% to 90%. So it is possible that an apparent 10% drop is actually a 1% drop. You may install Motocharge to see the battery in 1% increment.
I'm happy to hear everyone getting excellent battery life. The DEFY is a truly unique Android phone.. I'm just afraid that us stateside won't get devices like this because of AT&T... the Bravo is a step below the DEFY just because it doesn't share the same faux-rugged water resistant build. I'm glad T-Mobile picked this one up, overclocked it's only a bit slower than my Vibrant in most operations.
Well I did a Quadrant benchmark 'standoff' with a colleague of mine which has a Samsung Galaxy S [EU version of the Vibrant] and I beat him with over 250 points [the Galaxy S did 975, my Defy did 1334], both running Froyo and the Defy being non-overclocked.
I've also noticed that his Galaxy S tends to hang & stutter from time to time. Regarding battery life, he carries his charger with him at all times, I do not, 'nuff said.
I also get ~1.5days of battery life.
I'm able to squeeze more than 80 hours of usage on a single charge running PaYs 5.0. Light to moderate use of WiFi/Data/GPS/BT, no background syncs and most apps firewalled except through WiFi.
SetVsel:
18/300
32/700
58/1100
ABC_Universal said:
It is impossible to get 1.5 day if defy uses 10% for 1 hour standby. Defy rounds 95% to 100%, and 94% to 90%. So it is possible that an apparent 10% drop is actually a 1% drop. You may install Motocharge to see the battery in 1% increment.
Click to expand...
Click to collapse
i used circle battery widget and it does shows 1% increments. after 90%, it slows down in terms of usage.
i also forgot to mention that my defy sometime runs pretty hot at 35-38C, which i think accelerates the discharge
what about autobrightness? if is set it on, the battery drains much faster.
For me, with undervolt (800/46;600/30;300/18) I can use my phone to make calls, send sms, surf the web, run some apps, and run one a two games.
After 24h of that usage, I have 50% remaining.
a strange thing happened to me (sorry for my English):
Yesterday I installed the camera 360 that did not work it gave some error. Last night when I went to sleep (1-1.30) had 50% battery, in the morning (7.30-8) phone was dead. I put the phone to recharge, from 11 to 3 o'clock phone has reached 30% of battery so i put the phone to recharge again. Until 10 pm the phone has reached again 30% of battery so I decided to give him a factory reset. With 30% i did 100+ app backups with titanium pro and I gave factory reset, after the phone restore from factory reset surprise the battery show 60% ??? I did restore 100+ app and battery show 50%, I played about a half hour and still 50% battery??? what the hell happened??? 360 camera app has to do with rapid battery discharge???
- I use advance Task Manager droidwall, light <10%, original rom only rooted
- anyway Battery discharge I think is caused by the signal GSM of my operator's.
- anyway in the night i decided to kill the traffic and by that the battery shouldn't discharged hardly over night. right?
(Q) sometimes the touch screen it freezes in games so I have to put the phone in standby and come out of standby, and then the touch screen works again ... this happens to you to?
I have a 2800mah yoobao battery and its only lasting me about 18-20 hours...but a guy on youtube shows hes easily getting 2-3 days on his phone. I moderately use this phone with black backround...wifi enabled gps bluetooth and everything else i can disabled...and i have app killer and juice defender why is this battery not lasting long
Well first those ebay 2800mah batterys are more like 2100-2500mah. Second that guy on youtube did some black screen tricks and some other things to get 3 days. I wouldnt use any app managment programs unless you have 10 things that want to startup,and juice defender just isnt a good way to save battery unless you always have a bad signal,when you have a great signal very little battery life is used by the radio.
But I just posted some great numbers using the seido 3300mah battery,and I actually used this phone plenty during the tests...
Sent from my MyFrankenstein EC05OCE using XDAPA...
Like ecooce mentioned, those batteries aren't generally as good as they claim. But I can't answer your question until you answer a few more to the best of you ability:
1. Are you using a ROM? What ROM?
2. The "guy" on youtube was definitely using a ROM, what ROM was he using?
3. How long does your phone last on your stock Samsung 1500 mah battery, for reference?
4. How many and which widgets do you use?
5. Do you have poor signal and frequent roaming? Do you use Roam Control to rectify the constant signal searching?
6. Is your task killer an auto killer?
Answer me, and I'll answer you
well im not using a rom... i want to try to find the best rom for a extended battery. and i dont use any widgets just a clock one. i get about 10-12 hours on the regular battery if im lucky...im gettin about 18-20 on this one...i jus think i could get more
and yes i have roam control and i use task killer
ddizzy81 said:
well im not using a rom... i want to try to find the best rom for a extended battery. and i dont use any widgets just a clock one. i get about 10-12 hours on the regular battery if im lucky...im gettin about 18-20 on this one...i jus think i could get more
Click to expand...
Click to collapse
OK, this is simple math...1500mAh battery is stock, you get 10-12 hours. 2800 mAh battery is only 87% higher which equals 18-20 hours. This is only true if it is a true 2800 mAh battery...so count your blessings.
ddizzy81 said:
well im not using a rom... i want to try to find the best rom for a extended battery. and i dont use any widgets just a clock one. i get about 10-12 hours on the regular battery if im lucky...im gettin about 18-20 on this one...i jus think i could get more
Click to expand...
Click to collapse
Well you can try the Syndicate Rom Frozen I'm on, it's referenced in my signature. Only use your task killer manually. On auto-kill it will use battery to constantly run, and will kill services which immediately restart anyway. I use Advanced Task Killer manually by its widget, which, combined with my Power Control widget, are the only two widgets I have confirmed are not battery drains. This includes Pandora, Music player, Wifi Tether , Tesla Flashlight, and ES Task Manager widgets.
Moving on, Low brightness when possible, Google Sync off, unnecessary apps found to be running in the background removed. Google Wifi and GPS locations off, you want none of that. DRM and SNS services frozen by Titanium Pro or MyBackup Pro if unneeded (yes those apps are not free, but worth it!). Mostly black wallpapers use less power due to the nature of Super AMOLED screens (the pixels are effectively off when black). Do not use Juice Defender. VisionKernel 1.1 may be helpful. Do not use setcpu, stick with the Dev's stock settings, I'm sure you'll be happy :-D.
If I think of any major steps I've taken that I'm forgetting I'll be back lol. I think I may end up making a new thread on this with a list of my steps and setup.
RandomKing said:
Like ecooce mentioned, those batteries aren't generally as good as they claim. But I can't answer your question until you answer a few more to the best of you ability:
1. Are you using a ROM? What ROM?
2. The "guy" on youtube was definitely using a ROM, what ROM was he using?
3. How long does your phone last on your stock Samsung 1500 mah battery, for reference?
4. How many and which widgets do you use?
5. Do you have poor signal and frequent roaming? Do you use Roam Control to rectify the constant signal searching?
6. Is your task killer an auto killer?
Answer me, and I'll answer you
Click to expand...
Click to collapse
Well I'm that guy on youtube abd I believe I at that time I was on syadicateROM Froyo with a 1.3Mhz OC'd Kernal...now what saves on most of my battery life is underclocking while the screen is off to a max speed of only 600mhz...since about 75% of the time your screen is off...those numbers were for about the 1st 3 months with the battery....now I'm averaging from at least 30 hours to around 50 sometimes 60...but no more 3+ day stretches...and I make sure to condition my battery on a regular basis...because I did go through a major sump in performance jut like you are with around only 18 or so hours...a few (like 3) calibrations got me right back up to where I was at with hours unplugged....I think I talked about this in one of my video's...hope this helps fellas
Sent from my rooted, suited, & booted Epic 4G kno dat!
When I switched to ec05, my battery life went to crap. I now have the yoobao 2800 and with syndicate frozen and a few tweaks I now get around 24 hours moderate to heavy usage. 48 hours or more with light/idle usage.
On the other hand I'm lucky to get 8 hours out of my stock battery with light usage. I can literally sit and watch the srf battery meter draining every minute the screen is on. I'm thinking my stock battery may have gone bad.
The extended battery makes my phone huge. But theres nothing better than being at a conference talking on the phone constantly and still having 30% left at the end of the evening. While all the other evo's n blackberries n such are crying that their phones are dying by happy hour...
I'm not a heavy user, but I regularly get 30+ hours with 2.5 - 3 hours of screen on time off of a 1500MAH battery using SRF frozen.
You could have one of several issues:
1. Gallery app sensor issue.
2. Airplane toggle issue
3. phone not sleeping properly.
Any of them can severely impact battery life. If you look at your screen on time and you are regualrly at 2-3 hours screen on time in 12 hours then that is about right I would say.
I am a light to medium user and I get 40-55 hours of life out of my extended grant you my back ground is mostly black. Only widget I run is sense analog glass clock which pulls the weather every 15 minutes, I have task killer auto kill on, set cpu set to ondemand 10000 and 1000 which I believe is stock I was playing with it for a few still am (I just modified this to 13000 - 1000 set to performance so stay tuned for a update), Avg, wifi is usually on i forget to shut it off and gps is always on. I am using Frozen 1.1 with Vision kernal 1.1. Hope this helps. Don't forget to calibrate your battery I found that it does help to let it drain fully once after the calibration.
**********************************
Update well I have been testing since I first posted I am now getting about 18-24 hours but my usage has gone way up to high like 200 to 400 txt a day plus now using winamp cuz my music player died. Playing music for over 2 hours a day also poor signal strength at home so always have wifi on. Not sure what modem I am using not sure how to find that out either. Also my Setcpu is set to 1300 - 100 ondemand it didn't like having any other setting. I also turned journaling on which might not help the battery life.
EC05 suck your battery? Flash the EB13 modem. http://k0nane.info/rom/acs-eb13-modem.tar
I have this same battery and I have google and AOL email syncing every 30minutes, brightness on full, 6-7 widgets, 3 of which run constantly, and usually have pandora running most of the day, spotty signal, and data on all day...
I get 52-58 hours every charge with all this running, and an average of 4-6hours screen on time...
Also, when I put it on the charger i never let my battery get below 12% usually it goes back on after 55hours @ 16-21% left
Maybe I am lucky?
Running AOSP rom
ur lucky...cuz i have had this battery for about 2 weeks now and im starting to get about 24-26 hours of life...maybe the battery needs to be broken in cuz its increasing
I've been using CyanogenMOD 7 and love it (mostly). The one thing I don’t like about it is the short battery life. I'm kind of new to rooting phones so it took me a bit to get it rooted and get CM7 rolling. I was wondering if there are any mods out there like CM7 that have better battery life? Or if there's any thing I can add to CM7 to give it more batter life?
I've been using android since the first phone came out so I’m already knowledgeable in what to turn off to try and extend the battery life, but I have noticed a big decrees in batter since installing CM7.
Thanks for the help guys
Trench
You can under clock the processor when your phone is asleep. This creates better battery life.
Sent from my HTC Vision using XDA App
Have you tried wiping battery stats?
evilcuber said:
You can under clock the processor when your phone is asleep. This creates better battery life.
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
your phone automatically underclocks your processor when it sleeps (for most CPU governors), you do not need to tell it to do so.
I'm not picking on you fyi, I'm just making sure we are giving people accurate information... there's only one thing worse than no information: incorrect/incomplete information.
op: which version of CM7 are you running? remember, the more minimal your setup (ie less homescreens, less widgets, manual syncing of gmail and whatever else, etc) the better your battery life will be. this is especially true of newer phones that are getting heftier cpu & gpus that, while intelligent with power consumption, are going to drain even larger capacity batteries relatively quick with moderate/heavy usage.
how long are we talking with battery life? how heavy a user are you? for reference, I get around 16 hours of battery life if I don't charge the phone at all from unplugging to battery dying with moderate to heavy usage (texting ~50 times a day, sometimes up to 100 emails depending on what's happening at work, couple hours of calls, couple hours of streaming music [pandora or audiogalaxy], couple of hours of games [peggle and plants v zombies mostly - both of which are resource hogs], etc).
I have just learned to get used to the fact that the phone is going to die if I use it a lot, so I've purchased three micro-usb cables and a car charger.. that way, unless I'm in an area where there is no charge-capable usb port nearby, I'm always able to get a little more juice if need be.
pmcqueen said:
your phone automatically underclocks your processor when it sleeps (for most CPU governors), you do not need to tell it to do so.
I'm not picking on you fyi, I'm just making sure we are giving people accurate information... there's only one thing worse than no information: incorrect/incomplete information.
op: which version of CM7 are you running? remember, the more minimal your setup (ie less homescreens, less widgets, manual syncing of gmail and whatever else, etc) the better your battery life will be. this is especially true of newer phones that are getting heftier cpu & gpus that, while intelligent with power consumption, are going to drain even larger capacity batteries relatively quick with moderate/heavy usage.
how long are we talking with battery life? how heavy a user are you? for reference, I get around 16 hours of battery life if I don't charge the phone at all from unplugging to battery dying with moderate to heavy usage (texting ~50 times a day, sometimes up to 100 emails depending on what's happening at work, couple hours of calls, couple hours of streaming music [pandora or audiogalaxy], couple of hours of games [peggle and plants v zombies mostly - both of which are resource hogs], etc).
I have just learned to get used to the fact that the phone is going to die if I use it a lot, so I've purchased three micro-usb cables and a car charger.. that way, unless I'm in an area where there is no charge-capable usb port nearby, I'm always able to get a little more juice if need be.
Click to expand...
Click to collapse
but i also mean setting the max sleep to 368mhz. by default its set at 800mhz. sometimes with apps running in the background, the processor may go to 800mhz without you knowing
check out 'powersave' and set your cpu max to 806mhz. should last you a nice long time like that. responsiveness suffers, of course.
'ondemand' and 806mhz is the best comprimise for me. still fine with HDvideo recording, streaming audio, Nav, etc
if you really want to make it last... clock down to 400mhz, turn off all the sync, set brightness and timeout to minimum, all the radios off (airplane mode), and the volume down, on vibrate.
;-)
pmcqueen said:
your phone automatically underclocks your processor when it sleeps (for most CPU governors), you do not need to tell it to do so.
I'm not picking on you fyi, I'm just making sure we are giving people accurate information... there's only one thing worse than no information: incorrect/incomplete information.
op: which version of CM7 are you running? remember, the more minimal your setup (ie less homescreens, less widgets, manual syncing of gmail and whatever else, etc) the better your battery life will be. this is especially true of newer phones that are getting heftier cpu & gpus that, while intelligent with power consumption, are going to drain even larger capacity batteries relatively quick with moderate/heavy usage.
how long are we talking with battery life? how heavy a user are you? for reference, I get around 16 hours of battery life if I don't charge the phone at all from unplugging to battery dying with moderate to heavy usage (texting ~50 times a day, sometimes up to 100 emails depending on what's happening at work, couple hours of calls, couple hours of streaming music [pandora or audiogalaxy], couple of hours of games [peggle and plants v zombies mostly - both of which are resource hogs], etc).
I have just learned to get used to the fact that the phone is going to die if I use it a lot, so I've purchased three micro-usb cables and a car charger.. that way, unless I'm in an area where there is no charge-capable usb port nearby, I'm always able to get a little more juice if need be.
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But some govenors don't drop the sleep to the lowest profile. In fact almost all keep it above the lowest clock. Other kernels allow it and you can also use third party to set it lower. When the tweaKr script becomes universal it will be even better =)
Sent from hells ghost chili mexdroid
ohgood said:
check out 'powersave' and set your cpu max to 806mhz. should last you a nice long time like that. responsiveness suffers, of course.
'ondemand' and 806mhz is the best comprimise for me. still fine with HDvideo recording, streaming audio, Nav, etc
if you really want to make it last... clock down to 400mhz, turn off all the sync, set brightness and timeout to minimum, all the radios off (airplane mode), and the volume down, on vibrate.
;-)
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It suffers in powersave because it stays at the lowest setting only. No reason to set to 806. Lol and that bottom comment is hella funny =), but if he does that his phone will just be...a waste of pocket space.
Your best bet is to do some research on kernels. If you are using cm7 to cm 7.0.3 id recommened pyros kernel. If you are on 7.1 or a nightly over 121 I believe id go with eugene's streamline5. It did wonders for mine Also there is a battery saving tips. Google G2 battery saving tips. Should be first link that comes up.
Cyanogenmod roms are known to be battery hungry. Nom nom nom.
Sent from hells ghost chili mexdroid
cjward23 said:
Have you tried wiping battery stats?
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I used the battery califration app if that's what you mean.
Thanks for all the help guys, i'll check out some Kernals.
popimp315 said:
Your best bet is to do some research on kernels. If you are using cm7 to cm 7.0.3 id recommened pyros kernel.
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Do you have link for this? I'm running 7.0.3.. but I dont think im finding the correct Kernal.
Mugen 3600mah = better battery life...
Can you elaborate on what kind of battery life you are getting now? How many hours, and for what level of usage?
How long have you been on CM? It takes a couple charge cycles of the battery after flash any ROM, for the battery meter to be accurate. Clear battery stats (as mentioned) then charge to 100%, let drain to about 20%, repeat a couple times. Don't drain until the phone dies. Some people say to do this, and its not good advice. Over discharge of Li ion batteries can cause them to no longer take a charge. There are people on here, on the Vision and other phones, that let their battery drain to empty, then the phone would no longer boot, forcing them to replace the battery.
Mog said:
Mugen 3600mah = better battery life...
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It has good battery life but the battery sticks out a lot and its very uncomfortable
Sent from my HTC Vision using XDA App
evilcuber said:
It has good battery life but the battery sticks out a lot and its very uncomfortable
Sent from my HTC Vision using XDA App
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Yup its all opinionated. I would never go back to stock.
Sent from my T-Mobile G2 using XDA App
trench619 said:
Do you have link for this? I'm running 7.0.3.. but I dont think im finding the correct Kernal.
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Dev section
Sent from my HTC Vision using XDA Premium App
Dear nexus 7 FHD owners,
I have possessed my shiny new nexus 7 since tuesday last week, and boy am I happy with it. The only flaw it has is a dead (black) pixel in the lower left corner, which is covered by the soft button bar when in landscape.
While it is a fantastic tablet, I consider my battery life very weak. While I dont have exact numbers at hand, using google chrome to browse the interwebz drains the battery very quick imo (ill post on this in the future).
I do, however, have exact numbers on gaming. Yesterday I drained the battery from 100% to 14%, playing eternity warriors 2 for 3h14m straight, With a screen on time of 4h47m, of which an hour at the lowest brightness setting and the rest at 10-25%. Do these numbers seem to you? How much gaming time do you get on a single charge?
Idle drain seems about right, i left it at 88% when i went to bed last night, waking up with a charge of 85%. This is with wifi on in sleep, wifi and mobile network location on, currents disabled and all sync apps set to once/ hour. Though surprisingly when i tested the idle time during the day, leaving wifi off but all other settings unchanged, it drained 5% during my 6 hour school day, leaving the device at home.
I also played galaxy on fire 2 HD for 2h36m straight, draining the battery from 80-1% (i did maybe 10minutes worth of browsing in between).
I should mention that out of the box I had about 50% battery and I drained it to 1% on the first use before the first charge. I know this is bad for the battery, but it is said that most devices get their first full 100% charge in the factory right? Still though, might this have an impact on my battery life?
I'm looking forward to your feedback. The return policy ends tuesday next week, and I can return the device no questions asked until then. I will do that if it turns out my device's battery life is indeed quite the exception. I'm reluctant to do this, however, since I only have one dead pixel and I am afraid I might receive a device which has other or more flaws.
Your device's battery performance is pretty normal on the 2nd gen N7. Games seem to drain the battery the most. I get the same results. 3hrs with gaming. Worms Armageddon in my case. I usually get about 5-6 hrs od mixed screen-on use on a single charge. From what I observe Chrome will usually flatten the battery in 4-5 hrs depends on what pages you browse. The longest battery life you will get on video playback - up to 10 hrs with MXPlayer. That all on autobrightness.
I find these results a little disappointing. At least they are very far away from what is advertised. I do not know what is the biggest drain factor but I suspect the GPU and the wireless connectivity.
While transfering large video files over wifi between my nexus and an iPad it seems that the nexus uses more battery with screen off than the iPad with sceen on.
Sent from my Nexus 7 using Tapatalk 4
bandit_knight said:
Your device's battery performance is pretty normal on the 2nd gen N7. Games seem to drain the battery the most. I get the same results. 3hrs with gaming. Worms Armageddon in my case. I usually get about 5-6 hrs od mixed screen-on use on a single charge. From what I observe Chrome will usually flatten the battery in 4-5 hrs depends on what pages you browse. The longest battery life you will get on video playback - up to 10 hrs with MXPlayer. That all on autobrightness.
I find these results a little disappointing. At least they are very far away from what is advertised. I do not know what is the biggest drain factor but I suspect the GPU and the wireless connectivity.
While transfering large video files over wifi between my nexus and an iPad it seems that the nexus uses more battery with screen off than the iPad with sceen on.
Sent from my Nexus 7 using Tapatalk 4
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Thanks for your reply. It is really comforting that it's not just my device. Still considering a return for the dead pixel more and more, though.
RAM Hungry Games
I avoid RAM-Hungry activity. Mostly 3D games of course, drain my battery quickly when I have other services running, and the games that demand a lot of RAM at once will suck the juice out of that battery, so I usually keep it on the charger when playing demanding games.
Ionkiller said:
I avoid RAM-Hungry activity. Mostly 3D games of course, drain my battery quickly when I have other services running, and the games that demand a lot of RAM at once will suck the juice out of that battery, so I usually keep it on the charger when playing demanding games.
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How quickly does your battery drain when not plugged in though?
wow, such nice battery life, and complaining
Mine drained in about 1.5 days last week with a bit of usage, with wifi on the whole time. Charged from 11%. No sync.
todays results
Today my battery was drained in: 1.5 hour gaming, 1 hour chrome, 5 hours screen on time.
I find these numbers quite the disappointment.
Arthedes said:
Today my battery was drained in: 1.5 hour gaming, 1 hour chrome, 5 hours screen on time.
I find these numbers quite the disappointment.
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That does seem a little low to me. I don't do a lot of gaming (Tapped Out is about it) but I have a lot of on screen time between Kindle, web browsing and Netflix. This is all anecdotal though, I haven't actually measured how good my battery life has been, it just seems to be good to me.
Are you running a custom ROM? I'm running CM10.2 and I *think* battery life got better when I flashed it. But again, I didn't measure and compare so its just a gut feeling.
FuturePrimitive said:
That does seem a little low to me. I don't do a lot of gaming (Tapped Out is about it) but I have a lot of on screen time between Kindle, web browsing and Netflix. This is all anecdotal though, I haven't actually measured how good my battery life has been, it just seems to be good to me.
Are you running a custom ROM? I'm running CM10.2 and I *think* battery life got better when I flashed it. But again, I didn't measure and compare so its just a gut feeling.
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I'm running full stock. My stand by time is actually pretty good (1% overnight last night), but thats probably because ive disabled most power hungry features (location, wifi off in sleep etc).
While i do a lot of gaming and battery life is expected to be low then, I expected at least 4 to 5 hours worth of gaming, since it is advertised it should last 9 hours when viewing 1080p video (which is not streamed)
Arthedes said:
While i do a lot of gaming and battery life is expected to be low then, I expected at least 4 to 5 hours worth of gaming, since it is advertised it should last 9 hours when viewing 1080p video (which is not streamed)
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Bad assumption. The hardware video decoder is extremely efficient (at 0% brightness I measured 1.28W power consumption for 720p; equivalent to 11.7h battery life).
The CPU/GPU hits thermal throttling (not enough cooling to run at full speed) at about 5W power consumption (= 3h battery life). Going from 0% brightness to 100% brightness adds another 1.05W (total of 6.05W = 2.5h battery life). So a game that heavily loads the N7, can very quickly drain the battery.
tni.andro said:
Bad assumption. The hardware video decoder is extremely efficient (at 0% brightness I measured 1.28W power consumption for 720p; equivalent to 11.7h battery life).
The CPU/GPU hits thermal throttling (not enough cooling to run at full speed) at about 5W power consumption (= 3h battery life). Going from 0% brightness to 100% brightness adds another 1.05W (total of 6.05W = 2.5h battery life). So a game that heavily loads the N7, can very quickly drain the battery.
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Thank you for settling this problem with actual facts! IIRC the battery capacity was indeed 15Wh, though I didn't know max. usage was 5W, I thought it was more like 3-4W.
I'm a bit curious though as to how one monitors the system power consumption. Is ther an app for that?
Arthedes said:
I'm a bit curious though as to how one monitors the system power consumption. Is ther an app for that?
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I'm measuring via the USB port (I built a power monitor).
The N7 also has a battery gauge chip that can measure current. The driver logs some debug info, including a current drawn value every 60s. However, that value is only the average for one second, so it's not very stable.
In a root terminal, you can run
Code:
dmesg | grep bq27541
to get the debug info from the battery gauge chip.
(BTW, that current is the current flowing into or out of the battery, not the current used by the system.)
Arthedes said:
I'm a bit curious though as to how one monitors the system power consumption. Is ther an app for that?
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I use Battery Monitor Widget. Among many other graphs it provides a %/h graph. I can see in games my N7 drains at ~30%/h
https://play.google.com/store/apps/details?id=ccc71.bmw.pro
---------- Post added at 10:08 AM ---------- Previous post was at 10:03 AM ----------
tni.andro said:
Bad assumption. The hardware video decoder is extremely efficient (at 0% brightness I measured 1.28W power consumption for 720p; equivalent to 11.7h battery life).
The CPU/GPU hits thermal throttling (not enough cooling to run at full speed) at about 5W power consumption (= 3h battery life). Going from 0% brightness to 100% brightness adds another 1.05W (total of 6.05W = 2.5h battery life). So a game that heavily loads the N7, can very quickly drain the battery.
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Great explanation. Thanks. What is then happening in Chrome? It's the 2nd biggest battery drainer for me. From what I can see it drains battery at the rate of 20-25% per hour.
bandit_knight said:
Great explanation. Thanks. What is then happening in Chrome? It's the 2nd biggest battery drainer for me. From what I can see it drains battery at the rate of 20-25% per hour.
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Chrome is a CPU pig. Even sitting around on a web page with a single animated GIF will eat 1.8W at 0% brightness. Add in some web pages with a lot of Javascript (Javascript is extremely CPU inefficient) or not using an ad blocker (it's pretty common to to pull in ad-related Javascript junk from 20+ places on a single page and a lot of ads include animated crap) and you quickly get a lot more...