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Froyo FRF85B Battery Life Quirks

I don't know if I am the only one seeing this, but when I had Eclair, I had crap battery life, to the tune of 10 hours or so. (Granted this may not be crap for Nexus One but it is crap based off past phones I have had.) I installed FRF85B last night and discovered some weird glitches.
First off, when it was in my car dock, it wasn't charging yet the battery life kept dropping, I powered off the device, and powered it back on 10 minutes later (still in the dock) and no change stayed at 91%, still wouldn't charge. I then powered it off, took it out of the dock, plugged in the car charger cable directly and powered on my N1, when it turned on, it said I had 100% battery life. I then plugged it back into the car dock, and voila it started charging.
Secondly, originally when I had unplugged my N1 this morning I used it for about an hour at 5AM and it dropped 2% I plugged it back in to top it off expecting the same crap battery life from Eclair, yet so far, my phone has been fully topped off (from the car dock) for the past 40 minutes and I've made about 20 minutes of phone calls on it, yet it still is reporting 100%. So either Froyo can't properly report battery life, or it has the potential to have absurd battery life. Anyone else experiencing anything like this?

First off - you still didn't search this forum, so you're still thinking that an overcharging protection that doesn't allow you to charge unless you drop below 91%, is a quirk. It's not.
Second, wiping battery stats and making battery calibration procedure ONCE will give you a good starting point to measure something.

Jack_R1 said:
First off - you still didn't search this forum, so you're still thinking that an overcharging protection that doesn't allow you to charge unless you drop below 91%, is a quirk. It's not.
Second, wiping battery stats and making battery calibration procedure ONCE will give you a good starting point to measure something.
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The quirk isn't that it wouldn't let me charge that way, the issue was, my battery reported 91% yet when I rebooted the device with the charger directly plugged into it, it immediately showed 100%. So pretty much over the course of 30 seconds I gained 9% battery life.
I wiped my device to factory settings before upgrading to Froyo, and after as well, since my device is not rooted, my understanding is I cannot wipe my battery calibration log.
I did drain my battery fully after upgrading to froyo last night and did a full charge as well.

What you're describing looks like the statistics of the battery is "lying" a bit. I believe it can be thrown a bit off by trying to charge it when it's in 91-100% range, but I don't know the exact way it works, so I can't say much about it.
Indeed, if you're not rooted, wiping battery stats is not an option. Several times of full charge and long discharge (you don't need to go below 20%, to prevent harming the battery) are helpful in correcting the statistics.
If you get a chance to try, please repeat this again (having the phone at >90%, turning it off, plugging it into the charger and turning it back on). If it shows "Charged" again - it might be a bug worth reporting.

Jack_R1 said:
What you're describing looks like the statistics of the battery is "lying" a bit. I believe it can be thrown a bit off by trying to charge it when it's in 91-100% range, but I don't know the exact way it works, so I can't say much about it.
Indeed, if you're not rooted, wiping battery stats is not an option. Several times of full charge and long discharge (you don't need to go below 20%, to prevent harming the battery) are helpful in correcting the statistics.
If you get a chance to try, please repeat this again (having the phone at >90%, turning it off, plugging it into the charger and turning it back on). If it shows "Charged" again - it might be a bug worth reporting.
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I'll have to try it again tomorrow morning, first see if it happens under the same circumstances and go from there. One thing I do remember is the widget I was using "Battery Left" reported that at 91% I had 4100 mAh left in it, which was interesting, and when it went back to 100% it had 4120 mAh which makes me think the OS wasn't actually reading the voltage and thought it was just draining the battery instead.
EDIT: Just realised I had my wall charger with me, battery was at 90% figured I would try, real quick to attempt to replicate the problem, I was unable to, with a direct battery connection, but it could be due to a voltage issue or be related to why plugging it in directly to the car charger resolved the issue. My gut feeling is, it has to do with the dock itself and the pins it uses.

my battery often is charging and it hits 93% and immediately jumps right to 100%. it skips the last 7% or so. i think what is happening is you just finally experienced this issue, which many of us have already posted about in battery threads, but it just happens to coincide with froyo so you are thinking its new and related. the nexus ever once in a while battery meter just gets thrown off and will jump up to 100% because it really was full, just had to catch up the meter. you really should pay attention to the voltage more than percentage, using battery life widget. i know my battery is fully charged at 4.172 volts. and sometimes it hits that but still only shows 94%, so it adjusts itself in one fell swoop.

The issue is I did an extra full charge about an hour ago so I can make it till midnight and it went through all the numbers from 89-100 with no issue
Sent from my Nexus One using XDA App
Addendum: Also it seems to be voltage is not that good of a decider of how much my charge is. Before Froyo, until I dropped below 94% I was always above 4 Volts, now I drop below 4 Volts at 96%.

So this morning I was able to replicate the problem, only it was outside of the car dock, I was able to get this problem to reoccur with the wall charger. I unplugged it from power, used it a little bit and then topped it off for the day, it was at 96%. I saw the green light go on, and thought nothing of it, 20 minutes later I went back to it and it was still at 96% and showed that the battery was fully charged.
I checked the Battery Left widget and it was saying the battery was fully charged even though it said 96% left also. I did make a crappy video uploaded to youtube from my backflip to show as well what I am talking about.

AFAIK, The green LED will light when you're anywhere above 90%. It's not a function of charge being complete. Check it.
Also, if you plugged it in with 96% - this is the behavior to be expected, since the phone won't start charging unless it has below 90% to begin with, and it'll show "Charged" - because it's not charging (to prevent overcharge).
Again, fail to see any problem in what you're describing.

Jack_R1 said:
AFAIK, The green LED will light when you're anywhere above 90%. It's not a function of charge being complete. Check it.
Also, if you plugged it in with 96% - this is the behavior to be expected, since the phone won't start charging unless it has below 90% to begin with, and it'll show "Charged" - because it's not charging (to prevent overcharge).
Again, fail to see any problem in what you're describing.
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Yet my phone has always been able to charge when above 90% before froyo. This behavior is new to froyo for me at least.
Sent from my Nexus One using XDA App

It means that you've never paid attention to that until now. It's working this way since the phone was out (with stock Eclair) and if I'm not mistaken - it's not controlled by OS at all.

I did pay attention to such actually because of the fact that I had been getting piss poor battery life. This has never happened before. In the morning I would use the device a little then top it off because I noticed that works give better battery life.
Sent from my Nexus One using XDA App

Well, you had a buggy phone that has now corrected itself. Welcome to the way it was supposed to work from the beginning.
Topping off the battery at 90%+ contributes to battery degradation - heating from overcharging. So you were actually damaging your battery.

(Q) note charged itself over night ...?!

I was using the phone for about 2.5h with wifi on browsing reading some news and got the battery to 38%. Then I have activated the power saving option and locked the screen and went to bed. Now I just woke up and see that my battery is at41% wow. Did it charged up or what has happened?

An inaccuracy of the battery meter? It defenitely did not charge itself. That's physically and chemically impossible.
Sent from my Galaxy Note running ICS

It's weird how it constantly increased from 38-41 it was not just a sudden jump... I got sudden drops in battery after a usual reboot, and but never a slow increase....
Sent from a big screen...

xranekx said:
It's weird how it constantly increased from 38-41 it was not just a sudden jump... I got sudden drops in battery after a usual reboot, and but never a slow increase....
Sent from a big screen...
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Its normal it happen to me also and to others as i read their post.

xranekx said:
I was using the phone for about 2.5h with wifi on browsing reading some news and got the battery to 38%. Then I have activated the power saving option and locked the screen and went to bed. Now I just woke up and see that my battery is at41% wow. Did it charged up or what has happened?
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Actually yes it does happen.. I really can't pinpoint the reason though.. After heavy usage the battery does drain for a while after the usage and then since no usage some power is restored.. Same like AA batteries.. Example: Use AA batteries on a device till the device switches off.. Then leave the device idle for a while and battery will be usable for sometime though the device had switched off earlier due to complete drain..
I'm not an electronics person. So i dunno how or what makes this happen :silly:

Battery is discharging very fast

Hello I have a problem with my 4 month Nexus 7 3G. I noticed that recently the battery drains very fast in standby mode - for example 6-7% per hour. I installed better battery stats to see the deep sleep time and kernel/partial wakelocks... For example the tablet is 1hour and 20 mins in deep sleep and 1 min awake and has gone from 100 to 94 just in hour... Put the the tablet in Airplane mode, did hard reset, reflashed stock rom - no go... Is it possible that my battery has failed? And is it covered by warranty?

kopchev said:
Hello I have a problem with my 4 month Nexus 7 3G. I noticed that recently the battery drains very fast in standby mode - for example 6-7% per hour. I installed better battery stats to see the deep sleep time and kernel/partial wakelocks... For example the tablet is 1hour and 20 mins in deep sleep and 1 min awake and has gone from 100 to 94 just in hour... Put the the tablet in Airplane mode, did hard reset, reflashed stock rom - no go... Is it possible that my battery has failed? And is it covered by warranty?
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Read the first post in the BBS thread, do it. Post the log to their thread. Perhaps they can come up with something.
First thing I'd try is turning off wifi while it's asleep and see what happens. I've always turned off wifi while my tablets slept and I see about 1% every 6 or so hours, at most.

I factory reseted the tablet, switched the cellular off, the wifi off, turned off sync, didn't install or update any program... I put it in standby mode and after 57 mins it was 5% down. No kernel wakelocks, nothing at all, just deep sleep.

As with any form of problem isolation, you are going to try a few experiments to figure out where the problem is... and where it isn't.
If the problem is the battery itself, it will self-discharge even when the tablet is off and disconnected. (Not only that but the battery might be slightly warm when disconnected, but it might be hard to detect that without an IR Camera).
One experiment to eliminate this possibility is to charge the battery, turn the tablet off, and disconnect the battery overnight. Reconnect the battery, boot the tab, and then examine
the change in battery VOLTAGE, NOT "percent charge" *
You can use something like the app "Current Widget" to read the before/after voltage.
Note that you can't just turn the tablet off in this experiment without disconnecting the battery connector, as there is a possibility the the motherboard has a defect that drains power even when the tablet is off; although if you run this first experiment and find no drop in (unplugged) battery voltage, then doing this ("does the battery voltage fall a lot with the device turned off?") is a useful 2nd experiment.
*The TI BQ72451 battery charge controller IC attempts to gauge battery state by measuring both voltage and cumulative charging/discharging currents (by measuring voltage across a small resistor in the battery terminal path). This means that it is stateful (it has onboard flash memory) and more importantly that the "% charge" value this circuit produces is a computed value, not a measured value. If you are experiencing battery problems, the % charge value should be regarded with some amount of suspicion. For a healthy battery with about a 0.6-0.7v range (say 3.5v-4.2v), a 10% drop in battery capacity will be roughly a drop of about 0.06 volts.
This isn't a solution - but a place to start to eliminate some possibilities.
good luck
PS what does
Code:
$ cat /sys/class/power_supply/battery/health
return? (Should say "Good")

My tablet does the exact same thing. My battery average is 20 hours with use.
Sent from my Nexus 7 using xda premium

It says the battery health is good. I tried everything - reflashed the factory image, even 4.2.1 image, reset to factory defaults, removed the sim, switched off the wifi/nfc/3g... it drains exactly 5%/h in standby and the battery grafic show straight line downwards...The betterbattery stats says the 99% of time the tablet spends deep sleep. I came to the following conclusions: a) the battery has failed, b) the chip (or component) reading the battery stats is faulty c) a hardware defect that drains battery...It's not software since there are no indications that any piece of software is draining the batt.

If you turn the tablet completely off, let it sit for a few hours, and then boot the tablet, does it also lose charge this way as well?
How about if you do the above experiment - but unplug the battery completely instead of simply turning the tab off?
Doubtful this will fix anything, but it will give you more info about where the problem lies.
Along this same line of thinking, I note you have said nothing about voltages. Imagine that the charge controller chip thought that the 100% charge state was a lower voltage than what it should be - this would show up as anomolously large discharge rates (%/hr) even if the current draw was nominal.
I think 100% should be around 4150-4200 mV, and 5% around 3500 mV. (You can use the "Current Widget" app to observe the voltage in a convenient way.)
good luck

bftb0 said:
If you turn the tablet completely off, let it sit for a few hours, and then boot the tablet, does it also lose charge this way as well?
How about if you do the above experiment - but unplug the battery completely instead of simply turning the tab off?
Doubtful this will fix anything, but it will give you more info about where the problem lies.
Along this same line of thinking, I note you have said nothing about voltages. Imagine that the charge controller chip thought that the 100% charge state was a lower voltage than what it should be - this would show up as anomolously large discharge rates (%/hr) even if the current draw was nominal.
I think 100% should be around 4150-4200 mV, and 5% around 3500 mV. (You can use the "Current Widget" app to observe the voltage in a convenient way.)
good luck
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Hi, I tested the things u mentioned. The n7 charges until it reaches 4200 MV. It doesn't drain battery when powered off. Here are screenshots of usage:

kopchev said:
Hi, I tested the things u mentioned. The n7 charges until it reaches 4200 MV. It doesn't drain battery when powered off. Here are screenshots of usage:
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Note that the charger chip may not report a "% charge" drop even if the battery is self-discharging with the device off, as no current is detected in the battery lead. Hopefully what you mean by "doesn't drain" is "voltage didn't fall".
Well, I guess you now know that the problem probably is not the battery (although you should still confirm that the almost-discharged voltage is down around 3.5v).
Doesn't solve your troubles though. That 5%/hr drain with the tablet sleeping should be closer to 5% in 12 hours, so your tablet is doing at least 10x worse than it should.
Warranty return to Asus at this point?

Will relock the bootloader and return it to the Asus authorized service in bulgaria.

kopchev said:
Hi, I tested the things u mentioned. The n7 charges until it reaches 4200 MV. It doesn't drain battery when powered off. Here are screenshots of usage:
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wow, that is something. very nice discharging graph.

A nicer discharging graph...
ando1993 said:
wow, that is something. very nice discharging graph.
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Here is the graph after I factory reseted the N7 chrged to full and turned off the screen.

I've seen my battery standby performance get worse these last couple of weeks - I used to get between 5-7 days of standby time on a charge, if left unused, but the last few weeks it only goes for 2/3 days now, not sure what's changed...

NFC services were killing mine... Shut NFC off, killed the service, and it's been great for the last few days.

What is the average battery stats for nexus 7 ..
Sent from my Nexus 7 using xda premium

if you go into maps.....settings...location settings...uncheck all options, that seemed to do the trick for me

It's most likely the baseband_xmm_power wakelock, it's a nasty one. It comes and goes when it likes. Google hasn't come out with a fix yet. Reverting to stock doesn't help it. the only fix is to run Franco kernel, he patched it.
.Sent from my Nexus 7 using xda app-developers app

androo45 said:
It's most likely the baseband_xmm_power wakelock, it's a nasty one. It comes and goes when it likes. Google hasn't come out with a fix yet. Reverting to stock doesn't help it. the only fix is to run Franco kernel, he patched it.
.Sent from my Nexus 7 using xda app-developers app
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Mkernel also has it fixed, same with trinity and dmore kernel and I'm pretty sure faux kernel does as well, as for the stock kernel, it does not have the fix
Sent from my Nexus 7 using xda app-developers app

My battery was being murdered. Eventually I traced it to having Beautiful Widgets on the lock screen. Removed that and battery life is fantastic again. Are others using widgets on the lockscreen?

Try wakelock detector from playstore which will find you your wakelocks...

Deep sleep

Is it just me or is anyone else having this problem. Every time I charge my phone, and then take it off the charger I have know deep sleep. No matter what rom I am on. I have to go to Google framework clear data then reboot. Then I get deep sleep?

It can never deep sleep whilst on charge but as soon as it is off and been inactive a while, it should deep sleep. If yours isn't sleeping, I suggest installing better battery stats or something to see what's keeping it awake.

jason504 said:
Is it just me or is anyone else having this problem. Every time I charge my phone, and then take it off the charger I have know deep sleep. No matter what rom I am on. I have to go to Google framework clear data then reboot. Then I get deep sleep?
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thats how its supposed to be. it doesnt sleep while on the charger, as @rootSU said. but when off the charger, and the screen is off, it should go into deep sleep. if it doesnt, then you have a problem.

rootSU said:
It can never deep sleep whilst on charge but as soon as it is off and been inactive a while, it should deep sleep. If yours isn't sleeping, I suggest installing better battery stats or something to see what's keeping it awake.
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I understand that when on the charger it does not deep sleep I am saying after I take it off the charger it does not. Like when I wake up in the morning I grab my phone take it off the charger. Check my email look at Facebook. Now I have been on it for 5min and already at 97%. So I look at trickster and look at my info deepsleep 0. If I do nothing and continue using it it does not deep sleep. It continues to eat my battery. If I clear data in framework as soon as I wake up. Boom deepsleep? I mean yesterday I tried taking it off the charger and waited for a while and no deepsleep the best I got was 9% deepsleep. When I clear data I get 75% deepsleep for the rest of the day. I never had a problem like this with any other phone. I will try to take some screen shots

I have the same problem. Do you have an Android Wear device by any chance?

cc16177 said:
I have the same problem. Do you have an Android Wear device by any chance?
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No

jason504 said:
I understand that when on the charger it does not deep sleep I am saying after I take it off the charger it does not. Like when I wake up in the morning I grab my phone take it off the charger. Check my email look at Facebook. Now I have been on it for 5min and already at 97%. So I look at trickster and look at my info deepsleep 0. If I do nothing and continue using it it does not deep sleep. It continues to eat my battery. If I clear data in framework as soon as I wake up. Boom deepsleep? I mean yesterday I tried taking it off the charger and waited for a while and no deepsleep the best I got was 9% deepsleep. When I clear data I get 75% deepsleep for the rest of the day. I never had a problem like this with any other phone. I will try to take some screen shots
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I know what you were saying. Hence my response.

jason504 said:
I understand that when on the charger it does not deep sleep I am saying after I take it off the charger it does not. Like when I wake up in the morning I grab my phone take it off the charger. Check my email look at Facebook. Now I have been on it for 5min and already at 97%. So I look at trickster and look at my info deepsleep 0. If I do nothing and continue using it it does not deep sleep. It continues to eat my battery. If I clear data in framework as soon as I wake up. Boom deepsleep? I mean yesterday I tried taking it off the charger and waited for a while and no deepsleep the best I got was 9% deepsleep. When I clear data I get 75% deepsleep for the rest of the day. I never had a problem like this with any other phone. I will try to take some screen shots
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most likely its an app keeping your device awake. facebook is a known terrible app. i uninstalled it 3 years ago, and havent been happier. it drained 24% battery one day, when i never used it for a month. try uninstalling facebook, then check your deep sleep. facebook via the browser is just as good as the app.

First night on battery

I let it charge to 100% around 1am, unplugged and work up at 730am. Battery was on 85%. No use at all.
During regular use it seems to drain quickly. I've disabled probably 20 apps.

EVOme said:
I let it charge to 100% around 1am, unplugged and work up at 730am. Battery was on 85%. No use at all.
During regular use it seems to drain quickly. I've disabled probably 20 apps.
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I have my edge since Monday and what you're saying I have not experienced. Post some screen shots of your battery stats so we can have a better idea of what's going on

EVOme said:
I let it charge to 100% around 1am, unplugged and work up at 730am. Battery was on 85%. No use at all.
During regular use it seems to drain quickly. I've disabled probably 20 apps.
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I went to bed around 1am as well, woke up at 9:30am. I also disabled around 20 apps. Bedtime battery was at 95% wake up battery was at 85%. I dont think thats too bad at all.

I'm pretty happy with my battery life so far

Does Verizon have an immediate ota update like tmobile? I didn't he update right away and seems solid enough. Not as good as my g3, but way smaller of a battery in the edge.

Disable the Amazon App Suite from Applications manager. This has been the culprit for every carrier on the S6. If you use Amazon app store, download it through amazon directly (it is a different app than the one included with the phone).
Your problem will be solved right away!!
Also, the Edge display (not the contact color part, but the clock and news feed) is a battery drain.

another problem with alot of s6 owners, aside from the stock amazon app, is there has been alot of battery drain if using wifi. I had wifi on most of the time and noticed a drain from cell standby... once you turn off the wifi that never comes up and drain is perfectly fine... no cell standby battery drain...

My battery was terrible the first day, ok the second day, and far better today. Seems like it has a time it needs to settle down.

I haven't gotten >3.5 hours screen on time yet. Which kind of stinks.
Disabled a few more apps today, will see if they helps any.
Sure have been getting use out of the quick charging though.

Yesterday my phone took a change in the battery department....

EVOme said:
Yesterday my phone took a change in the battery department....
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Wow!
What's your screen-on time? Power-saving enabled at any moment?

open1your1eyes0 said:
Wow!
What's your screen-on time? Power-saving enabled at any moment?
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Sorry, I didn't look at that before I plugged it in.

Almost 6 hrs of screenon time use, Netflix for 30 mins...Facebook and texting. Screen set at around 30% brightness. Happy with my S6.
Not disappointed in how short the overall battery is...it does what I want and need it to do.

Yesterday my phone was dead from 6am to 6pm today at 5pm still have 47% left and I definitely used it more today. Better with age?

Hello I just gave my first full charge to my phone and the cell stand by is at the top, is there a way to avoid this or we going to accept to live with it, thanks for your help.

my battery wasn't too bad either