Hi All,
Ever since i've upgraded to WM6.1 on my HX4700 I get a battery drain while PDA is off. Charged the battery to 100% and during the night (~11 hours) the battery has only 70% charge left. With WM2003SE it would be ~99% or so.
Does anybody know if this is normal for WM6.1 or that my battery is dying? Battery is about 2 to 3 years old.
GPS, WiFI, BT all is off.
Any way of measuring if the batt still OK? When idle i have about 200mA drain.
Any good replacement batteries available, price/quality ?
Thanks in advance!
I'd say your batter is on the way out, there should be practically zero [less than 1% of total capacity per day] drain at room tempreture and even less the colder it gets.
Getting 2-3 years out of a battery is pretty good.
http://en.wikipedia.org/wiki/Lithium_Ion_Battery#Guidelines_for_prolonging_Li-ion_battery_life
you should have a look on the processes runing in Background. Per example SK-Tools or the integrated Taskmanager can show you how much cpu-usage a process causes. It should be around 0-2% when no program is started in Background. If there is a higher cpu-usage something is wrong. Perhaps some Software that doesn´t fit to WM6.1
I had a Ipaq H6340 and after 5years of daily usage the battery was still able to hold on for 5days(with some usage). So the HP batterys are not as bad as many other batterys put in some devices.
Regards
Puzom said:
Hi All,
Ever since i've upgraded to WM6.1 on my HX4700 I get a battery drain while PDA is off. Charged the battery to 100% and during the night (~11 hours) the battery has only 70% charge left. With WM2003SE it would be ~99% or so.
Does anybody know if this is normal for WM6.1 or that my battery is dying? Battery is about 2 to 3 years old.
GPS, WiFI, BT all is off.
Any way of measuring if the batt still OK? When idle i have about 200mA drain.
Any good replacement batteries available, price/quality ?
Thanks in advance!
Click to expand...
Click to collapse
Try to recalibrate your battery, you can found it in the Wiki, I have my original battery since Aug 05 and with an extensive use (WI-FI, bluetooth, a lot of calls and internet) it last for 28hours form 100% till recharge
Hope this helps
Cheers
y17dt said:
you should have a look on the processes runing in Background. Per example SK-Tools or the integrated Taskmanager can show you how much cpu-usage a process causes. It should be around 0-2% when no program is started in Background. If there is a higher cpu-usage something is wrong. Perhaps some Software that doesn´t fit to WM6.1
I had a Ipaq H6340 and after 5years of daily usage the battery was still able to hold on for 5days(with some usage). So the HP batterys are not as bad as many other batterys put in some devices.
Regards
Click to expand...
Click to collapse
I come from a different device camp (Loox) but you may be experiencing the same issue that our community has with the WM5, WM6 and WM6.1 (much the same MS code as your HP) ? The culprit is probably ActiveSync on the PPC. It seems to come alive for notifications or "silent" alarms/tasks or appointments set by the Calendar application. It then leaves the device on for as long as the time before switch off on battery power is reached! I agree that soemthing like SK-Tools should detect it, but you have to be around to see it. It is amazing how much power is taken by these events.
Worth checking? The Loox solution was to create a dummy or Fake server in ActiveSync and make sure it only ever wakes under manual control not automatically and to make the on time with no activity on battery very short.
You might also like to try the freeware acbPowerMeter application? A search on this site or Google will find it. It shows you current consumption in any PPC device when on battery. It is quite revealing and you can find out just what current is taken by each setting (e.g. scrren brightness) and application. I have had it installed on 3 generations of PDAs including an old HP Jornada.
Thanks for the replies!
desolateone
Wondering if the batt is bad as yesterday it ran about 7 hours from 100% to 2%, pda was on and idle.
y17dt
CPU usage is only 0-2% or so when idle. Don't have much running in the background. Notestoday and Wisbar Advance 3.
orb3000
I did a recharge last night after letting it drain to 2%. So let's see if that did the recalibration. Read on other topics that indeed after installing WM6.1 it's best to drain the bad and recharge as it needs to calibrate again.
fingerstoo
When the PDA is on and idle, it consumes about 180mA with now and again a peak around 400mA, so nothing big.
Will check the activesync out as maybe that is what is activated when PDA is off. Yet via SK tools I set AS auto connect to OFF.
Thanks!
desolateone said:
I'd say your batter is on the way out, there should be practically zero [less than 1% of total capacity per day] drain at room tempreture and even less the colder it gets.
Getting 2-3 years out of a battery is pretty good.
http://en.wikipedia.org/wiki/Lithium_Ion_Battery#Guidelines_for_prolonging_Li-ion_battery_life
Click to expand...
Click to collapse
unless you have the mogul/titan
Hi,
Seems to be fixed now that I drained the batt to 2% and recharged it to 100%.
Overnight the drain was 1% only
Cheers!
Related
Just wondering how the Orbit fairs on battery life before needing charging
is this a better XDA battery life wise than its predecessors?
I listen to the radio all the time on my P3300. My talk time is about 1/2 hour per day. And, of course, some occasional usage as a PDA. With this usage pattern, the device looses about 30% of charge per day. Yesterday at night, after having the device fully charged, I used it as a GPS navigator for about an hour and than did some browsing on the internet via WiFi. Today at 11am, I found the remaining charge to be 68%.
Well I'm new to XDAs and having only had my Orbit for 2 days I'm not overly impressed with battery life. I fully charged the battery overnight and today form 8.30am, I have used around 1 hour of talktime, 15 minutes of internet via wifi and a wireless router and used terminal services for remote access for another 15 minutes. I have probably used it another 15 minutes adding tasks and calendar entries and it shut itself down at 9.30pm tonight.
I consider my useage to be on the low side but if I use it to it's full potential, I can see me having to recharge it twice a day at this rate.
IME experience the battery life (after the first flush of acquisition ie constant fiddling ) is waay better than any of the phones in my sig (exception the Motorola A1000), comparable to my Nokia 6280.
well..to maximize ur battery life..i suggest to put the brightness of the screen to da least..i hav done dat..n i must comment im pretty impresed with da performance..3 days n kicking with 10% still to go....!!
Hi,
Though this is not entirely relevant, my MDA Compact 3 ran for 7 hours with continuous use of Memory Map GPS mapping software (backlight set to go off after 5 minutes).
Regards
I'm actually very impressed with battery life.
Much better than my last Pda (mio P550) and Co-pilot (and i-go) use so little power compared to TTNav(5) Ie dont need to plug in charger on a long journey !
(TT nav ate the battery in about 50mins !!).
Obviously it depends on use and with all the xtra features, GPS, wiFi, etc to play with it can run down faster than a simple moby. Tip: turn off wifi, bluetooth and anyservices not using (easy to do with the o2 shortcup installed in bottom rh corner).
got problem iv upgrade my phone to black 2.5 and upgrade the radio to 1.41
now my battery finish after 8 houres(always after 3 days)
i dont use mach the phone so the battery not good now
i want to konw is this can be cause the upgrade to black or because i upgrade the radio freom 1.38 to 1.41
what can cause it?
It would be helpful to know which operator you have...
But, try different radios. It seems that radios have a more significant impact on battery life in general.
Ok Thanks I Had Black 2.0 Was Very Good
And I Had Radio 1.30
Iv Got Spl 2.10 And Jasjam
I Guess Ill Put Back Radio 1.38
Was Best For Me
Great. Let us know if that sorts your problem.
I had the same problem with my battery after flashing Black 2.0, and subsequently 2.5
It was because when i flashed the Hermes to WM6 it was only at 50% battery life. WM6 must recalculate the battery at 50% battery life to 100%. Hence my battery was screwed only ever charging to 50%, but WM6 assumed it was 100%
ended up getting a 2400mAh replacement of ebay
Sweet. Nice info skip. Did you have to get a case for that phone with the new battery? I was looking into getting one but I didnt know what phone case supports the bigger battery. Any suggestions?
I had the same problem only after flashing to Black 2.5. The phone would be dead after about 8 hrs using pushmail all day.
Anyway, my "fix" was to pull the battery, then pop it back in and charge without turning the phone on. That way, the OS wasn't running, and only the internal phone charger was in charge of regulating the power, at least that is my guess.
Anyway, after one session of that, it has been fine. Give that a try and see if that fixes the half charges you're getting.
edmundg said:
I had the same problem only after flashing to Black 2.5. The phone would be dead after about 8 hrs using pushmail all day.
Anyway, my "fix" was to pull the battery, then pop it back in and charge without turning the phone on. That way, the OS wasn't running, and only the internal phone charger was in charge of regulating the power, at least that is my guess.
Anyway, after one session of that, it has been fine. Give that a try and see if that fixes the half charges you're getting.
Click to expand...
Click to collapse
I tried "resetting" the battery like that but left out a step...will try that and see. Did you run it dead or can you start the process when the battery is at say 50%?
Jim
skipjack said:
I had the same problem with my battery after flashing Black 2.0, and subsequently 2.5
It was because when i flashed the Hermes to WM6 it was only at 50% battery life. WM6 must recalculate the battery at 50% battery life to 100%. Hence my battery was screwed only ever charging to 50%, but WM6 assumed it was 100%
ended up getting a 2400mAh replacement of ebay
Click to expand...
Click to collapse
hmm. I have same problem with battery. my battery barely lasts one full day and before the upgrade i used to charge once in 2 days. Do you guys really think the battery level matters when flashing?
edmundg said:
I had the same problem only after flashing to Black 2.5. The phone would be dead after about 8 hrs using pushmail all day.
Anyway, my "fix" was to pull the battery, then pop it back in and charge without turning the phone on. That way, the OS wasn't running, and only the internal phone charger was in charge of regulating the power, at least that is my guess.
Anyway, after one session of that, it has been fine. Give that a try and see if that fixes the half charges you're getting.
Click to expand...
Click to collapse
Thanks. My battery was still pretty good, but not "great". I assumed some settings changes effected it. I did this and it is lasting longer. With all the "HELP!!! ROM KILLED MY BATTERY" type posts, this is a GREAT find. Thanks.
Brutalbat said:
hmm. I have same problem with battery. my battery barely lasts one full day and before the upgrade i used to charge once in 2 days. Do you guys really think the battery level matters when flashing?
Click to expand...
Click to collapse
Im not convinced, would be a VERY weird way of calculating battery levels and would totally rely on the user having 100% when the OS is flashed.
My bet would be that the new Radio is causing some problems, or even further the problem might be caused by 3rd party software (which ive seen MANY times).
Maybe you could solve that issue by using an external charger. Get the battery up to 100% again. This might persuade the Tytn to recalibrate.
skipjack said:
I had the same problem with my battery after flashing Black 2.0, and subsequently 2.5
It was because when i flashed the Hermes to WM6 it was only at 50% battery life. WM6 must recalculate the battery at 50% battery life to 100%. Hence my battery was screwed only ever charging to 50%, but WM6 assumed it was 100%
ended up getting a 2400mAh replacement of ebay
Click to expand...
Click to collapse
I have had the same problem with Battery life after upgrading to Black 2.5 and radio 1.41. Unfortunately I upgraded both the ROM and the Radio at the same time, so I could not identify where the problem came from.
From reading comments on radio 1.41, most users seem to report improved battery life over earlier radios.
My battery was approximately 60% when I upgraded the Radio and ROM. I am going to try the battery charging trick mentioned above tonight and see if it helps.
yep, will pop the original battery in and try charging it without turning on
The ROM doesn't matter. Most all lithium powered devices with a batter meter use smart chips to monitor current into and out from the battery to give battery status. They all get slowly out of calibration over time with many partial charge/discharge cycles typical to phones and light duty use. The best way to calibrate them in a phone would be to pull the battery, then re-insert it and charge it fully. Much of the commercial gear (medical) that I use is calibrated by running fully down, then recharge to full to re-set the meter calculator. These batteries do have the smart chips in the pack.
Lithiums are very specific on charge voltage as well, 4.2v per cell at full charge and 3.0 considered fully discharged (any lower and the battery is toast, most devices shutdown to prevent over discharge).
A simpler device might just measure the battery voltage alone, then scaling the 3.0 to 4.2v output of the battery to a 0 to 100% reading. This type is most likely used in phones which have little to no active electronics in the packs themselves. PDA's use a mix I believe, as some software can be used to calculate runtimes based on realtime current drain.
Last but not least, lithiums simply have a shelf life of only a couple of years. In a phone, I'd say a year and they are already showing noticeably lower capacity.
edmundg said:
I had the same problem only after flashing to Black 2.5. The phone would be dead after about 8 hrs using pushmail all day.
Anyway, my "fix" was to pull the battery, then pop it back in and charge without turning the phone on. That way, the OS wasn't running, and only the internal phone charger was in charge of regulating the power, at least that is my guess.
Anyway, after one session of that, it has been fine. Give that a try and see if that fixes the half charges you're getting.
Click to expand...
Click to collapse
I didn't believe this at first, but I tried it anyway (I was desperate).
It works!!!!!! Thanks alot
RemE said:
The ROM doesn't matter. Most all lithium powered devices with a batter meter use smart chips to monitor current into and out from the battery to give battery status. They all get slowly out of calibration over time with many partial charge/discharge cycles typical to phones and light duty use. The best way to calibrate them in a phone would be to pull the battery, then re-insert it and charge it fully. Much of the commercial gear (medical) that I use is calibrated by running fully down, then recharge to full to re-set the meter calculator. These batteries do have the smart chips in the pack.
Lithiums are very specific on charge voltage as well, 4.2v per cell at full charge and 3.0 considered fully discharged (any lower and the battery is toast, most devices shutdown to prevent over discharge).
A simpler device might just measure the battery voltage alone, then scaling the 3.0 to 4.2v output of the battery to a 0 to 100% reading. This type is most likely used in phones which have little to no active electronics in the packs themselves. PDA's use a mix I believe, as some software can be used to calculate runtimes based on realtime current drain.
Last but not least, lithiums simply have a shelf life of only a couple of years. In a phone, I'd say a year and they are already showing noticeably lower capacity.
Click to expand...
Click to collapse
Interesting theory and very educational. I would say that most people should come back saying the trick worked. I am actually going to try it myself because of the logic.
Thanks,
OK, just a little update:
It must be either Black 2.5 or the radio, i've tried default fresh installs with 3 differnet fully charged batteries, my original, the 2400mAh ebay one and a borrowed battery from a friends vario.
Im still getting major battery drain - a few hours in standby mode ?
gonna try upgrading to black 3.0 today
Same problem here, severe battery drain with Black 2.5 and radio 1.41. Tried the battery trick, doesn't seem to work for me.
Have tried multiple settings to preserve battery life, but no results yet. Started this morning, fully loaded, did about 30 phonecalls this morning and already 60% battery. Battery won't last till the end of the day.
I will install Black 3 tonight.
after upgrading to Black 3.0 im still getting this dreaded battery drain, Gonna try the radio
currently running 1.40.30.00 on T-mobile UK
goin to try upgrade to 1.41.00.10 and see if that helps
Can other users who suffer the battery drain please let me know what radio they are running?
Cheers
No one cpould advise me on the charging issues that was was posted here
http://forum.xda-developers.com/showthread.php?t=391732. Can some one pls help me in the below mentioned charging issue?
I picked up the extended battery for my Hermes 100 (running 19701.1.1.0 PV DVH (G&C) with 1.54.30.10 radio) since I was not happy about the OEM battery life.
Now I am facing this problem of the batteries not fully charging. Even after overnight charging my phone would be showing 50% (I use battery status) If I reset the phone now with charger connected, would show 80% charge. If I remove the battery for a minute and put it back on then OEM battery would show 100% charge and the extended battery would show 90%.
I've tried charging the extended battery with the phone off for 18 hrs but the light never turned green.
Can some one help me with this my batteries are also draining very fast compared to my old prophet by 8 hrs of regular usage I am down to 10% (with backlight on minimum, and 3G turned off) . Could some one gimme the tips to get over the charging issue and conserve battery power? Thanks in advance
If your extended life battery is draining in 8 hours, then you have either some software going nuts and hogging the CPU 100% of the time, or you have faulty hardware.
I had a similar issue, and after weeks of testing, they took the phone back and replaced every PCB inside the unit. Problem was solved, and now I get 1-2 days off the stock OEM battery with average usage.
Oh..ho.. That's trouble
Thanks for the feedback.. But I am in India and got this phone from UK... What do I DO...
i use these softwares, do you see any Villains in them ??
BatteryStatusExt.1.05.build_0294 ( This show CPU usage between 30-50 on moderate use)
SRS_WOWHD_ARM_BT_Myfixed.cab
Cloudyfa_EsmertecJbed.cab
ConnectionSetup_1_0_31002_1.cab
Clean+3G+Icon.cab
htchome-2.1-hermes-n2a.cab
HTweakC_2.1b.cab
Schaps_AdvancedConfig_v2[1].1.0.0.CAB
SKTools5qOLD.CAB
pmClean.arm.cab
Synchrotime
thanks..
It must be a battery defect. Try putting new battery and see what happen.
Some new ROM Makers have problems with the ROM Kitchens so better to try new ROM or try an older version from the Legend ROM Makers
jasjamming
schaps
faria
etc
Umm..
Lemme wait for Schaps new one.... Hopefully I could get this sorted out??
Rgrds
Riyaz
I'm surprised that nobody is mentioning the poor battery performance on the tilt 2.
I'm at 50 percent already with 8 hours standby (sleeping) and 2 hours of work.
I have my email update after every 15 minutes, and bluetooth on. No wifi.
Is it just this device or the ROM. I'd rather not say the ROM to implicate, but can we get an honest evaluation from Touch Pro users about how long their batteries are lasting??? Please.
hi, battery calibrations are lost when flashing roms. It is said to take a full discharge and full uninterrupted charge to restore these calibrations which cause reduced battery performance and also using the phone for a few days also helps too. I admit I would like to see better battery life generally, but its the price we have to pay for such a feature-rich amazing device.
Things like Lumous (auto back light software) can help out controlling how bright the backlight shines in certain scenarios. Setting backlight to switch off after 10 seconds and device to sleep after a minute can help out too along with not having 3G connected when not needed as with data connection, bluetooth, wifi etc.
Hope this helps out.
in regard sto battery calibrations, I have done that, and i have been with the same rom for 5 days
hmmm yeah I do know what you mean though about the performance of it, perhaps invest in a new battery, an extended one maybe? My TP2 lasts on average 2-3 days with some music playing, weather updating, not much calling, alot of texting and maybe some internet use.
same battery issues here with 6.5 stock rom but after hard reset
battery live is 30 hours with stil 2 stripes on batt indicator
pres green-red button-powerbutton read the message and then volume up.
Oh and I think the first battery loading is done 2 quickly the green Indicator after 1.5 hour was green < hold the device loading for 4 hours
yea i always perform a hard reset after flashing a new rom, i personally find the full discharge and recharge a good way to get things back to normal. However currently experiencing a max reading of 99% despite green light and it stopping charging. Have let it fully discharge until it turns off, and then left the device in bootloader to make sure the battery is completely dead and left it charge overnight but yet still only get such a reading. Perhaps when I flash an updated rom the reinstall may restore (which won't be too far away I'm sure, loving the Cell Pro series, thanks Sergio!)
There are a lot of reasons for the battery life to go down quickly. I have used many different ROMs (mostly cooked ones from the chiefs here) and have not found a lot of difference in my battery performance. It has been noted somewhere on this forum (room-mate read it somewhere here) that the stock radio on the tilt2 seems to be best battery life for most who have used it.
So to sum some things up:
- Version of radio
- how bright the screen is kept at all times
- number of applications running all the time (including auto updates for stocks, weather, push web pages, etc.)
- Temperature (going from a warm house to the cold outdoors)
- speed of processor
- size of screen/resolution
can all lead to shorter battery life.
Living in a rural area vs. downtown in a major city can also greatly affect your battery life. Most buildings will have cellular devices attached to them as companies receive some money from cellular companies for hosting their equipment. So battery life is much better downtown as the phone does not have to search as much for a lock on a good signal.
cd993 said:
yea i always perform a hard reset after flashing a new rom, i personally find the full discharge and recharge a good way to get things back to normal. However currently experiencing a max reading of 99% despite green light and it stopping charging. Have let it fully discharge until it turns off, and then left the device in bootloader to make sure the battery is completely dead and left it charge overnight but yet still only get such a reading. Perhaps when I flash an updated rom the reinstall may restore (which won't be too far away I'm sure, loving the Cell Pro series, thanks Sergio!)
Click to expand...
Click to collapse
Never fully discharge the battery! Most all devices will use Li-lon batteries and when over charged or fully drained you can kill the battery. Most devices are intelligent enough to charge up to (approximately) 98% and only let the battery drop to no less than 2% of life before shutting off. I used to do support for HP notebooks, and when they introduced lithium-ion batteries, people would demand a new battery when it would not charge past 98%. This made them change the way the software was reading the battery to reflect the 98% to read 100% on a full charge.
There is a good link in the wiki for our phones... I'll give it free of charge this time: http://forum.xda-developers.com/showthread.php?t=519673
Dangerously said:
Never fully discharge the battery! Most all devices will use Li-lon batteries and when over charged or fully drained you can kill the battery. Most devices are intelligent enough to charge up to (approximately) 98% and only let the battery drop to no less than 2% of life before shutting off. I used to do support for HP notebooks, and when they introduced lithium-ion batteries, people would demand a new battery when it would not charge past 98%. This made them change the way the software was reading the battery to reflect the 98% to read 100% on a full charge.
There is a good link in the wiki for our phones... I'll give it free of charge this time: http://forum.xda-developers.com/showthread.php?t=519673
Click to expand...
Click to collapse
thanks for the info, will give that wiki a read!
What kind of battery time are you guys getting on the original battery?
I've had my phone for about 14 days now and im not getting more than 12 hours on a charge.. the first week iv'e been using the phone alot.
I have alot of apps installed and im wondering if that could have a impact on the battery.. i have tryed using a task killer and without..
From the battery usage statistics page the screen is definitely the one that uses the most. Voice calls is number 2.
Will all applications show on the battery statistics page or is this something the applications have to implement?
Sent from my HTC Desire Z using XDA App
My battery has gotten better since I got it. But I have been doing a few things to help my battery - e.g. I completely drain the battery (until the phone doesn't even turn on anymore) and then fully charge it overnight.
Read about task killers and Android here: http://forum.xda-developers.com/showthread.php?t=849974
All apps will show in the battery usage statistics. If the screen has been using the most power, that means exactly that - you've been using the phone a lot and as such the screen has been taking up a lot of power.
I would recommend though to try to completely drain and then overnight charge, and repeat that cycle as often as you can.. I'm no technician, but I do think how you charge the phone matters
i've read about the task killers and have decided to uninstall them compleetly and let android do what it wants.
Regarding the charging, i have ran the battery flat out almost every day..
Im going to try a few different charging methods and see if there is some difference..
however i suspect that if the indicator is saying 100% charge, thats exatcly what it is whatever the charging method. (i hope)
It does get better. When I first got the phone I was getting about 14 hours. Now I'm getting about 30 hours or so.
JuiceDefender and setCPU help preserve battery life, too.
I am lucky to even get 12 hours with minimal use. No calls, just some texting and maybe browsing my bank website. Screen is always the killer for me, even on 20% brightness. If I go lower the screen actually flickers.
I bought the red HTC Chichitech batteries and they didn't help me at all.
Tried overclocking module, didn't change much.
The only app that ever shows any significant battery use (over 5%) is Maps, when I use maps.
i always thought completly draining a Lithium-ion battery is a bad idea?
Yes, it is.
Older batteries such as Ni-MH should be completely worked out from full to dead in order to keep them going in the long run. Li-ion doesn't need to be worked out, in fact the more it is worked out the faster it will run through it's lifespan and stop holding a charge.
Now that batteries, phones, and chargers are all smart, it's supposedly good to keep them plugged in as often as you can instead of letting them run dry.
sukie said:
i always thought completly draining a Lithium-ion battery is a bad idea?
Click to expand...
Click to collapse
The post (#7) above is correct on this. You should not let the battery dip below 30%, since discharging it too low may prevent it from being able to take a charge. It happens to most of us on accident every once in a while. But you should avoid it if possible.
It is good to run through a couple charge/discharge cycles to calibrate the battery meter. Many people still think this is to "condition" the battery, but battery conditioning is only the case with the older NiCad type of rechargeable batteries. Charging/discharging the battery just helps calibrate the battery meter on the phone. For new phones or a new ROM flash, I usually charge the battery to 100%, then let it drain to 30%, and repeat a couple times.
sukie said:
i always thought completly draining a Lithium-ion battery is a bad idea?
Click to expand...
Click to collapse
It's also a bad idea to charge a cold Li battery, but I believe that affects lifespan more than charge. For those of us in colder climes, remember to wait for the battery to warm up to room temp before plugging in.
On my DZ I usually get 15~20h of battery life and it's O/C @ 1.4Ghz
3G & wifi : always on
facebook, gmail, emails, news, weather updates each hour
about 1h per day of audio streaming (deezer, Synology DS audio)
1~2h of internet and games per day (baseball superstars, angry birds, psx4droid...)
less than 30min of calls per day and about 20-30 sms...
sukie said:
i always thought completly draining a Lithium-ion battery is a bad idea?
Click to expand...
Click to collapse
It depends what you mean by "completely". If you drain the voltage of a LiIon battery too low, you will damage it. But the circuitry of the phone is normally designed that there's a cut-off before you get to this, i.e. "completely" discharging it by running it till the phone turns off will be before this dangerous level, so should be safe.
It's unnecessary though, your phone can tolerate a *lot* more partial discharges/charges than full discharges/charges. If you drain it ten times from 100% to 90% and charge again, then that's roughly equivalent to one whole discharge/charge from 100% to 0% and back again.
As redpoint73 said, the main issues it "training" Android to get the battery calibration right, not conditioning the battery (which only applies to NiMH, NiCad, etc).
Li-Ion batteries are protected from deep discharges in two ways:
1. The Phone, it will stop you from discharging too low.
2. The battery itself. Each Li-Ion battery contains circuitry that stops it from discharging too low.
Basically both have to fail to have you end up with a dead battery -> rarely happens.
Li-Ions take the heaviest duty when charging the top 90-100% charge, charging just that bit stresses the battery more than from 0-80% (ofc 0 not really being 0 ) Note: This only has an effect on battery LIFE, not battery capacity! -> if you keep charging your battery from 90-100% (for example by keeping it plugged in after driving to work, then recharge after driving home, basically always going from 100-90-100 you're really doing your battery a disservice life-cycle wise)
If Li-Ions are not in use for a while they should be stored at around 60-70% charge.
Now as for batteries in Android devices, I'd estimate that most causes of extreme battery drain are due to rampant programs/too many internet accesses.
Everytime you log onto the internet, or change speeds (3G -> Edge-> whatever) you take a lot more power than usual. Try to ensure that all your programs that regularly access the net, do so together (HTC Sense interface tries to do this)
Rampant Programs: Especially services that need to poll the clock a lot, or keep updating their info, keep their FPS high (games) It is for this reason I try to avoid installing a lot of programs at once, and keep it one at a time (especially for system programs) to see if there's a inordinate change in battery life.
Oh and do turn off unneeded things like bluetooth, wifi, and GPS if you don't need them... but thats a given.
Gee typed more than I was planning, just get tired of seeing these threads all over
Jacina said:
Li-Ions take the heaviest duty when charging the top 90-100% charge, charging just that bit stresses the battery more than from 0-80% (ofc 0 not really being 0 ) Note: This only has an effect on battery LIFE, not battery capacity! -> if you keep charging your battery from 90-100% (for example by keeping it plugged in after driving to work, then recharge after driving home, basically always going from 100-90-100 you're really doing your battery a disservice life-cycle wise)
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Sorry but I disagree with that. Have you got any evidence to back that up ? Continually charging the battery from 90% to 100% should be fine and shouldn't shorten its life at all. Chargers will sometimes reduce their charge when the battery is nearly full, and a slower/lesser charge will actually increase its life (I have no idea whether the DZ's charger does this or not).
Jacina said:
Li-Ion batteries are protected from deep discharges in two ways:
1. The Phone, it will stop you from discharging too low.
2. The battery itself. Each Li-Ion battery contains circuitry that stops it from discharging too low.
Basically both have to fail to have you end up with a dead battery -> rarely happens.
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Coming from the Touch Pro 2 forum, there are somewhat occasional posts by users that discharged their batteries too low, and get stuck in a boot loop. Leaving the battery on the wall charger (USB is not enough) for a long period of time seems to solve the issue in some instances, while others are forced to replace the battery.
As you said, instances of this are relatively rare. I've drained my battery until the phone shuts down plenty of times on accident, with no ill results. But best to play it safe and not do it intentionally.
When you mention the phone prevents the battery from discharging too low, is that the hardware, or the OS? I guess either way, maybe the Desire Z or the Android OS are better at this then Windows Mobile and the Touch Pro 2. But I still wouldn't discharge the battery too low intentionally.
I'm pretty sure on the Touch Pro 2 it was software based (hence actually allowing you to boot before saying "not enough charge" )
I doubt that ANY charger that comes with a phone is anything but a normal "charge till full" charger...
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
All information is gathered there. (other articles there are also highly informative)
nivlheim_o_O? said:
On my DZ I usually get 15~20h of battery life and it's O/C @ 1.4Ghz
3G & wifi : always on
facebook, gmail, emails, news, weather updates each hour
about 1h per day of audio streaming (deezer, Synology DS audio)
1~2h of internet and games per day (baseball superstars, angry birds, psx4droid...)
less than 30min of calls per day and about 20-30 sms...
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That is intense, are you serious?!
I barely make it through the day and I don't game or make many calls. usually just texts and emails.
My update intervals for emails are much more frequent though.
Lucky !
im usually not getting more than 10 hours on a charge... :s thinking about getting the 1800mAh mugen battery...
Sh0rty007 said:
im usually not getting more than 10 hours on a charge... :s thinking about getting the 1800mAh mugen battery...
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Are you using it pretty heavily? I just got the phone Tuesday, and still playing with it a lot, so I can't comment on battery life yet. But what is your screen brightness set to? If you look at the battery use graph, you will see that the display uses the most power, and with any smartphone, the biggest culprit of short battery life. Turn the brightness as low as you can tolerate for your "average" viewing conditions. Also, be sure you've calibrated the battery meter as I've described in Post #8 above.
A word of caution as far as the Mugen extended battaries: one of the users here did a bunch of battary tests on OEM and different aftermarket brands, on various phones. The Mugen 1800 mAh batteries did not rate any better than the OEM 1400 mAh. Mugen tried to explain away the test results. But judge for yourself.
http://forum.xda-developers.com/showthread.php?t=583927
My screen brightness is just 25 or 45%. And i really don't make it to the end of the day.
I now have setcpu, so that when my screen is off my cpu is running on 300mhz. Think i can make it now through the day.
I use my phone a lot, thats true. But only to view the market or twitter things..
Ow and i don't use live wallpapers...
I think there is a lot to be said for keeping things turned off if you do not use/need them too much.
I leave my phone charging overnight (between 11pm and 6:30am). So when I leave the house in the morning it is fully charged.
I keep Wifi and 3G turned off unless I need to use it and I keep brightness to a minimum - again, only increasing it if I need it.
Normal usage for me would be about 1 hours music listening during my commute to work, a couple of texts a day and about 10mins worth of calls a day.
On top of that about 4 hours worth of data use (both Wifi and 3G) and I usually find I still have over 50% battery life left when I plug it back in around 11pm before going to bed (according to the Mini Info widget).
Granted this is fairly light use compared to some people, but I think if you take the time to control your app usage you should see better performance results!