Develop Bugs

[Q] NFC effect on battery life

Hello,
I want to know if my experience is common or not. I had my phone at ~90% and changed it to airplane mode to try and conserve battery while I went snowboarding. Got back to the phone about 7 hours later and it was dead. Plugged it in and turned it on and found out that "NFC Service" took up 80% of my battery for those 5 hours. When I turn NFC off this does not show in the battery log, but I don't want a major potential feature of this phone to be unusable. Anyone else experience NFC destroying their battery?
Thanks.

I am noticing my Galaxy Nexus not lasting as much as my Rezound did, but it had a larger extended battery. I also use Ultimate Juice to enable / disable my internet connection. So with my extended battery + ultimate juice + brightness on 30% or so I still have 29% battery after a full 25 hours. I would just disable NFC because I do not see it in my battery usage. It is only useful for Google Wallet, and wireless charging (correct me if im wrong).

I use the NFC quite frequently during the day by having various profiles set up around my house, and my battery seems to be fine. Are you using a custom rom or kernel? If the NFC battery issues always occur, I would try reflashing your Nexus. Seeing as NFC itself doesn't eat a significant amount of power, I would guess that the Android OS is being kept awake by the process.
Sent from my Galaxy Nexus using Tapatalk

Well I got annoyed and was one day from the end of my return window so I went to Verizon and told them I wanted another phone. They gave in and I just got the new one. Hoping the phone was the problem. I was unrooted with 4.0.2 installed. I don't have a huge need for NFC, but I don't like to think a feature of the phone was completely useless to me when I have seen others who leave it on with no ill effects.
Thanks

[Q] Zerolemon my ass!!!

I am posting screenshots from my Note 2 after using the Zerolemon 9300mah battery for 2 weeks.
Please excuse the clarity, I was using a filter at night time.
Now of course I have followed all the procedures of the 6 charge cycles and draining the battery to 2%. I keep only data and gps on, I don't use bluetooth, WIFI, NFC, or any other bloatware. Screen brightness is at max the majority of the time, and so is sync. I do some browsing and youtube, and make some short phone calls during the day. CPU and GPU levels are at normal stock levels and speaking of which, I'm running stock rom with perseus. Obviously the first...I should say 10-12% gets eaten up in a flash from 100%, and after it does slow down. On the whole though, as you can see its made it to around 16 hours.
Bottom line is, people do claim to reach at least 3 whole days, if not 2, with heavy usage. I was hoping zerolemon would do this for me but clearly not. Do I have defective phone, or am I just asking for too much? Any help is appreciated! :good:

I get that with stock battery and better...
That's not a good for 9300 mAh battery!
Maybe sync is taking a lot from battery..
Or maybe an app using do much power in background.. Or deepsleep is not working correctly.. Low signal also can affect the battery too..
9300 mAh should at least get you 15 screen hours.. While u only got 6..
Formating the phone completely maybe? That would solve too many issues..
Also if there is a warranty for the battery, maybe getting a replacement? Maybe it's damaged or simething..
Sent from my GT-N7100

after 9 hours of work, i usually used 20%.
which is much better than stock battery, with it, it went down under 50% everyday.
so i am quite happy with zerolemon
Sent from my GT-N7100 using xda premium

[Q] Unexplainable Battery Life

Here's another battery problem thread guys,
Here's my scenario:
My d2att is rooted and has CyanogenMod 10.1.3 Stable running on it. Nothing has been tweaked in terms of bloatware since CyanogenMod is pretty good about not putting crap on their ROM.
I have a stock 2100 mAh battery from Samsung and a 4200 mAh battery from Hyperion Electronics.
I decided to run tests on each battery on two separate nights to see how they ran. I did this using BetterBatteryStats under the same conditions. I charged each battery to 100%, disabled all radios including GPS, sync, wifi, NFC and Mobile Data and left the phone on over night in a span of 8 hours.
Night 1 - Stock Battery: 100% - 40% in a span of 8 hours with BBS reading "mmc_camera" as the main culprit for battery drain.
Night 2 - Hyperion Batter: 100% - 98% in a span of 8 hours with BBS reading "AudioOut_2" as the top partial wakelock.
My questions are 1) what is "mmc_camera" and why was it keeping my phone awake? and 2) why is there such a dramatic difference in battery drain between the two batteries?
Before anyone tells me, "because the second battery is substantially bigger", I know this. It's essentially 2x the amount of the stock battery. However, based on simple ratios, if the battery is 2x larger than stock, why is the Hyperion battery only draining 1/30th as much as the stock? That doesn't make sense.
Someone please let me know what they can tell me about my problem because I'm seriously sick of trying to power manage my smartphone.

I have noticed this as well it makes no sense? I have the same exact problem you are seeing.
Sent from my SAMSUNG-SGH-I747 using XDA Premium HD app

waiting for the solution.
I had the same problem, any suggestion?
n_alvarez2007 said:
Here's another battery problem thread guys,
Here's my scenario:
My d2att is rooted and has CyanogenMod 10.1.3 Stable running on it. Nothing has been tweaked in terms of bloatware since CyanogenMod is pretty good about not putting crap on their ROM.
I have a stock 2100 mAh battery from Samsung and a 4200 mAh battery from Hyperion Electronics.
I decided to run tests on each battery on two separate nights to see how they ran. I did this using BetterBatteryStats under the same conditions. I charged each battery to 100%, disabled all radios including GPS, sync, wifi, NFC and Mobile Data and left the phone on over night in a span of 8 hours.
Night 1 - Stock Battery: 100% - 40% in a span of 8 hours with BBS reading "mmc_camera" as the main culprit for battery drain.
Night 2 - Hyperion Batter: 100% - 98% in a span of 8 hours with BBS reading "AudioOut_2" as the top partial wakelock.
My questions are 1) what is "mmc_camera" and why was it keeping my phone awake? and 2) why is there such a dramatic difference in battery drain between the two batteries?
Before anyone tells me, "because the second battery is substantially bigger", I know this. It's essentially 2x the amount of the stock battery. However, based on simple ratios, if the battery is 2x larger than stock, why is the Hyperion battery only draining 1/30th as much as the stock? That doesn't make sense.
Someone please let me know what they can tell me about my problem because I'm seriously sick of trying to power manage my smartphone.
Click to expand...
Click to collapse

n_alvarez2007 said:
Here's another battery problem thread guys,
Here's my scenario:
My d2att is rooted and has CyanogenMod 10.1.3 Stable running on it. Nothing has been tweaked in terms of bloatware since CyanogenMod is pretty good about not putting crap on their ROM.
I have a stock 2100 mAh battery from Samsung and a 4200 mAh battery from Hyperion Electronics.
I decided to run tests on each battery on two separate nights to see how they ran. I did this using BetterBatteryStats under the same conditions. I charged each battery to 100%, disabled all radios including GPS, sync, wifi, NFC and Mobile Data and left the phone on over night in a span of 8 hours.
Night 1 - Stock Battery: 100% - 40% in a span of 8 hours with BBS reading "mmc_camera" as the main culprit for battery drain.
Night 2 - Hyperion Batter: 100% - 98% in a span of 8 hours with BBS reading "AudioOut_2" as the top partial wakelock.
My questions are 1) what is "mmc_camera" and why was it keeping my phone awake? and 2) why is there such a dramatic difference in battery drain between the two batteries?
Before anyone tells me, "because the second battery is substantially bigger", I know this. It's essentially 2x the amount of the stock battery. However, based on simple ratios, if the battery is 2x larger than stock, why is the Hyperion battery only draining 1/30th as much as the stock? That doesn't make sense.
Someone please let me know what they can tell me about my problem because I'm seriously sick of trying to power manage my smartphone.
Click to expand...
Click to collapse
Bump

Try to make sure your front camera sensor is disabled, there's some settings that have the phone look through the camera to see if you are going to wake it up.(something could be in motion settings.)
Or reboot and run the test again. Sometimes the phone glitches out if not rebooted.
Sent from my GT-I9300 using xda app-developers app

G Pro Kitkat Battery hogs

is it just me or is the kitkat ROM really sucks----battery pretty well?
I also notice that the CPU usage does not drop to 20 percent idle but when I used other ROM (JB based) it becomes 5 percent.
RAM usage is good but I think it hogs the CPU. I used cpuz on measuring the cpu usage

fafalafafa said:
is it just me or is the kitkat ROM really sucks----battery pretty well?
I also notice that the CPU usage does not drop to 20 percent idle but when I used other ROM (JB based) it becomes 5 percent.
RAM usage is good but I think it hogs the CPU. I used cpuz on measuring the cpu usage
Click to expand...
Click to collapse
Where can I get the JB rom for OGP?
For me, Android was best at JB and went backwards with KK.
Yes, I've noticed absolutely horrible battery life with KK. KK just feels like it is several different parts all just thrown together.

The only reason I think is that theoretically JB uses more battery is that the system uses more voltage than the kitkat. however, what's less voltage use if the CPU is always busy and wakeups are just everywhere.

Hi guys, maybe you could post in some battery stats so we could know more about whats draining your battery in particular and suggest some fixes. I've actually experienced the opposite with kitkat-battery life for me improved. There was even an instance that I got the phone to last 30 hours, with 5 hours, 48 mins. screen. On another instance I got 15 hours life and 5 hours 25 mins screen on. I just lost the screenshots as I had to reflash stock when i was doing some G3 mods., but nevertheless i could post some new ones.
I value batter life was well and i'm curious to see how yours could be improved too..

blitzkriegger said:
Hi guys, maybe you could post in some battery stats so we could know more about whats draining your battery in particular and suggest some fixes. I've actually experienced the opposite with kitkat-battery life for me improved. There was even an instance that I got the phone to last 30 hours, with 5 hours, 48 mins. screen. On another instance I got 15 hours life and 5 hours 25 mins screen on. I just lost the screenshots as I had to reflash stock when i was doing some G3 mods., but nevertheless i could post some new ones.
I value batter life was well and i'm curious to see how yours could be improved too..
Click to expand...
Click to collapse
What a battery life. 15 hours screen time?
how can we accurately measure? because I only use CPU-Z and installed DS battery saver to save power. right now it only used 2% of my battery during the night. (from 1:45 - 5:50am)
I see. can you tell me what app should I use to determine CPU usage of each app/service?

fafalafafa said:
What a battery life. 15 hours screen time?
how can we accurately measure? because I only use CPU-Z and installed DS battery saver to save power. right now it only used 2% of my battery during the night. (from 1:45 - 5:50am)
I see. can you tell me what app should I use to determine CPU usage of each app/service?
Click to expand...
Click to collapse
No, my battery lasted 15 hours, and my screen-on time (total time i spent using the phone) was 5+ hours coz i basically used my phone then for gaming the whole day I suggest you download gsam battery monitor app (it also has a temperature_bat. Usage graph), as well as wakelock detector. Another alternative would be better battery stats. What you would need to observe would be the apps and wakelocks draining your battery both when you are using your phone, and also when its idle.

I also notice that battery capacity is 2A in which it should be 3.140A right?
this shows on kitKat but on jellybean, it's 3.140A again.
is there something wrong with the detection of battery capacity?

fafalafafa said:
I also notice that battery capacity is 2A in which it should be 3.140A right?
this shows on kitKat but on jellybean, it's 3.140A again.
is there something wrong with the detection of battery capacity?
Click to expand...
Click to collapse
What happened was that in kitkat, the permisssions required to be able to access battery stat files changed. Thus, apps w/c could freely access the batter stats in JB cannot gain complete access in Kitkat. This is the case for some battery monitor apps w/c now have lesser accuracy in reporting battery. No worries though, as there are means to bypass this problem. If you have xposed you could install a module for this. Also, some apps like gsam battery monitor come with a separate root companion app. Once you install those batter stats will be accurate.

Here's a screenshot of my battery stats for today..might not be 5+ hrs of screen on as i did a lot of rebooting today (themed with g3 tweaksbox). Nevertheless, this is just to show that kitkat has the potential to provide good battery life. Also enclosed is a screenshot of one of the battery apps i use, gsam.

Hey everybody! I have some findings I absolutely must share so you can benefit as well.
I've been doing some tinkering and I've find a way to significantly increase battery life on the OGP.
First thing you'll want to do is put your phone into airplane mode.
Second, turn your screen brightness down as low as it will go. I mean, all of the way down.
Third, don't play any games on your phone.
Try those three tweaks and see what kind of battery improvement you get.
Unfortunately, Camera has stopped.

Perry2547 said:
Hey everybody! I have some findings I absolutely must share so you can benefit as well.
I've been doing some tinkering and I've find a way to significantly increase battery life on the OGP.
First thing you'll want to do is put your phone into airplane mode.
Second, turn your screen brightness down as low as it will go. I mean, all of the way down.
Third, don't play any games on your phone.
Try those three tweaks and see what kind of battery improvement you get.
Unfortunately, Camera has stopped.
Click to expand...
Click to collapse
Just so you know, first my cell radio and wifi were both on the whole time. Second, i was on auto brightness the whole time. Third, i played clash of clans as you see in there.

If you have not done this already, adjust your cpu to save your battery juice. Set the cpu governor to powersaver or interactive mode if you just using the phone to send msg and make calls. I let my phone run on msm-dvcs and when I'm not plug in. Check out ROM toolbox if you're rooted. Seriously folks, instead of complaint about how much the roms suck the juice, try these different ways to see they make any difference for you.
Sent from my LG-E980 using XDA Premium 4 mobile app

Perry2547 said:
Hey everybody! I have some findings I absolutely must share so you can benefit as well.
I've been doing some tinkering and I've find a way to significantly increase battery life on the OGP.
First thing you'll want to do is put your phone into airplane mode.
Second, turn your screen brightness down as low as it will go. I mean, all of the way down.
Third, don't play any games on your phone.
Try those three tweaks and see what kind of battery improvement you get.
Unfortunately, Camera has stopped.
Click to expand...
Click to collapse
That's pretty much a tablet use. You want great battery buy a zero lemon battery, the bulk is worth it, I got 3 days with very heavy use

Perry2547 said:
Hey everybody! I have some findings I absolutely must share so you can benefit as well.
I've been doing some tinkering and I've find a way to significantly increase battery life on the OGP.
First thing you'll want to do is put your phone into airplane mode.
Second, turn your screen brightness down as low as it will go. I mean, all of the way down.
Third, don't play any games on your phone.
Try those three tweaks and see what kind of battery improvement you get.
Unfortunately, Camera has stopped.
Click to expand...
Click to collapse
I found a way to make my phone last a long time. I just turn my phone off and don't use it. I wish I would have though of this sooner.
Sent from my LG-E980 using xda app-developers app

[Q] New Battery - Better Android System Usage?

I have an AT&T Samsung Galaxy Note 4 running Lollipop. I've noticed I have been having fairly poor battery life over the last few days with Android System taking up the most usage. I purchased a spare battery for my Note 4 yesterday and I have been using the new battery with my phone. My android system usage is significantly lower with the new battery. Does this mean the older battery is defective? Or is it something else with the phone? Has anyone experience the same circumstances?
And yes, I have a SD card installed and I have factory reset my phone and wipe the cache after I installed Lollipop.

hw335 said:
I have an AT&T Samsung Galaxy Note 4 running Lollipop. I've noticed I have been having fairly poor battery life over the last few days with Android System taking up the most usage. I purchased a spare battery for my Note 4 yesterday and I have been using the new battery with my phone. My android system usage is significantly lower with the new battery. Does this mean the older battery is defective? Or is it something else with the phone? Has anyone experience the same circumstances?
And yes, I have a SD card installed and I have factory reset my phone and wipe the cache after I installed Lollipop.
Click to expand...
Click to collapse
If I were you, I'd use the new battery a few days before jumping to conclusions. The Android System usage may start up again. Knock on wood that it doesn't.
Sent from my SAMSUNG-SM-N910A using Tapatalk

spexwood said:
If I were you, I'd use the new battery a few days before jumping to conclusions. The Android System usage may start up again. Knock on wood that it doesn't.
Sent from my SAMSUNG-SM-N910A using Tapatalk
Click to expand...
Click to collapse
Thanks for the reply. Hopefully it won't start up again. I just feel it's weird because a new battery shouldn't affect what is using the battery but rather how long the battery lasts. Isn't that right?

hw335 said:
Thanks for the reply. Hopefully it won't start up again. I just feel it's weird because a new battery shouldn't affect what is using the battery but rather how long the battery lasts. Isn't that right?
Click to expand...
Click to collapse
I think so. I mean, the only thing I could think of that might reduce ASystem with a new battery would be if the new battery didn't have NFC. Then MAYBE ASystem will go down just because the system wouldn't be detecting the NFC chip. But even then, I wouldn't expect a huge drop in %usage.
If the old battery was defective, I also wouldn't expect ASystem to run high. If the CPU were bad though, then it definitely would because the cpu may not enter deep sleep, so the phone is always technically on. (I had the happen with my old phone. Had to get it warranty replaced).
Just keep an eye on it for a few days to see if things continue to stay good.
Btw, what battery? OEM? Third party? Large capacity (like a 6400mAh battery)?
Sent from my SAMSUNG-SM-N910A using Tapatalk

spexwood said:
I think so. I mean, the only thing I could think of that might reduce ASystem with a new battery would be if the new battery didn't have NFC. Then MAYBE ASystem will go down just because the system wouldn't be detecting the NFC chip. But even then, I wouldn't expect a huge drop in %usage.
If the old battery was defective, I also wouldn't expect ASystem to run high. If the CPU were bad though, then it definitely would because the cpu may not enter deep sleep, so the phone is always technically on. (I had the happen with my old phone. Had to get it warranty replaced).
Just keep an eye on it for a few days to see if things continue to stay good.
Btw, what battery? OEM? Third party? Large capacity (like a 6400mAh battery)?
Sent from my SAMSUNG-SM-N910A using Tapatalk
Click to expand...
Click to collapse
The new battery is just OEM. and thanks for your input.

So...with the new battery about 10 hours of run time and 4.5 hours of screen time (mostly YouTube). I am at 8% battery life? Is this normal?
Also here's my setup
- Bluetooth off.
- Location On - Power Saving Mode
- WiFi on and connected, look for WiFi network is On. Always connected to WiFI is on.
- YouTube @ 15% of Battery and Screen / Android System both taking up 14%.
- Screen Brightness on Auto
Is this normal or should I be getting battery life out of my phone?

hw335 said:
So...with the new battery about 10 hours of run time and 4.5 hours of screen time (mostly YouTube). I am at 8% battery life? Is this normal?
Also here's my setup
- Bluetooth off.
- Location On - Power Saving Mode
- WiFi on and connected, look for WiFi network is On. Always connected to WiFI is on.
- YouTube @ 15% of Battery and Screen / Android System both taking up 14%.
- Screen Brightness on Auto
Is this normal or should I be getting battery life out of my phone?
Click to expand...
Click to collapse
I think many people report 4.5-5 hours of constant screen on time, so I think your getting normal battery life.
I usually get about 1-2 hrs screen on time, but my phone is in standby for tge rest of the time. I usually then get a day and a half of battery life (or 2 days).
Sent from my SAMSUNG-SM-N910A using Tapatalk