Battery Usage Screen ??? - Nexus 7 Q&A, Help & Troubleshooting

Sorry if this is a stupid question I just need some clarification.
The battery usage screen shows how long you have been running on battery days, hours, minutes, seconds etc should this information be retained even after you power off, say you run it for 30 minutes on battery and power off when you turn it on again should it still show 30 minutes on battery and add on the new minutes or should it start from scratch again (0 seconds) ?

>>X<< said:
Sorry if this is a stupid question I just need some clarification.
The battery usage screen shows how long you have been running on battery days, hours, minutes, seconds etc should this information be retained even after you power off, say you run it for 30 minutes on battery and power off when you turn it on again should it still show 30 minutes on battery and add on the new minutes or should it start from scratch again (0 seconds) ?
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mine has been really inconsistent on my nexus. sometimes it'll be ahead a few hours but almost never does it exactly match up with the actual time. plus, it never updates if I press the refresh button. the only way to get it to refresh it to completely close the settings app and open it again. But yeah' a reboot tends to reset the counter.

So if its working correctly power off should reset the time counter because I'm sure this wasn't happening to mine at first hence the confusion plus the guide doesn't exactly read that way ?

That seems good
Sent from my Nexus 7 using xda app-developers app

The battery usage stats carry on from where they left off from when the device was last powered down. They are only reset when it has been charged to 100% and unplugged.

Salty Wagyu said:
The battery usage stats carry on from where they left off from when the device was last powered down. They are only reset when it has been charged to 100% and unplugged.
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Well that's what I thought it should do so I guess I'm unlucky then
The first one I had behaved that way for two weeks then started resetting back to 0 seconds after power off so I sent it back for another which I got today this also worked correctly until I charged it for the first time now that's also resetting back to 0 seconds after power off.
Not done anything to this one except install two apps, I sent the other one back because even a factory reset didn't solve the problem that was also on stock not unlocked or rooted.

Related

another battery thing to try

found this on another site don't know if it has any relevance since i just tried it but will keep you posted:
Disclaimer: the following may *not* to the HTC EVO! And yes, of course we should NEVER have to deal with this kind of kluge. But it might help…
There’s a known bug in the cell radio software on at least one other HTC Android phone (Eris) that can significantly reduce battery life. Basically, it thinks it doesn’t have a signal (though it’s connected) and frequently keeps trying to connect, which steadily drains the battery, even when the phone is apparently idle.
To check if this is affecting your phone:
From the home screen, press Menu, Settings.
Scroll down to the bottom and press About Phone.
Press Battery
Press Battery Use
Press Cell Standby.
Take a look at Time Without Signal. If it’s 0% or a bit higher, then your phone is not affected and you can stop reading. If it’s 50% or significantly higher than you know it should be (e.g. you were in cell range all or most of the time), then the phone is being affected by this problem. BTW, Time Without Signal may not be displayed in some circumstances – try again later. AFAIK, all HTC Eris’s are affected, not sure about other phones.
The good news is that there’s a simple way to fix it (usually called the Airplane Mode trick):
Power your phone off and then restart it.
Once it’s fully booted, plug in the charger.
From the Home screen, press Menu, Settings and Wireless & Networks.
Press Airplane Mode and wait until it’s checked and back to full brightness.
Unplug the charger.
Press Airplane mode and make sure that it’s unchecked.
That’s it!
Will this fix cut down down on searching for a cell signal? Can anyone verify thi works?
Trying this now. Will report back in a few hours.
It doesn't make any sense, but I think this might have worked. I tried this about 4 hours ago and I'm still at 0%. I was getting as much as 50% without service. I'll report back again after I have some more time to test it.
I'm at 10 hours now and it's still at 0%. I don't know why this works, but it appears to actually work. I was even able to turn on always on data with no negative battery consumption since I don't really have much auto-syncing.
Thank you very much OP.
biscodude said:
I'm at 10 hours now and it's still at 0%. I don't know why this works, but it appears to actually work. I was even able to turn on always on data with no negative battery consumption since I don't really have much auto-syncing.
Thank you very much OP.
Click to expand...
Click to collapse
Same here, went from 4:00pm yesterday to 5:00am this morning and still had 50% battery. Watched some trailers, used a flashlight app ( alot, thanks to being without power till this morning), did some texting, and was watching weather radar. My time without a signal is staying at 0% also.
Thanks also.
Here's an easier way to do this from a previous post. FYI - I did this a few days ago. Here's my current battery test stats (I'm letting it drain itself out and see how long I can go).
Uptime: 32 Hours, 45 Minutes
Awake Time: 4 Hours, 30 Minutes
It has not been on a charger since it was last fully charged. Love it.
http://forum.xda-developers.com/showthread.php?t=700601&highlight=battery
Wow, my stand by was at 58%, though I am inside a building with horrible reception, I sure hope this fixes it.
Will this fix be permanent or will I have to do this every time I plug the phone back in or after reboot?
Ketty said:
Will this fix be permanent or will I have to do this every time I plug the phone back in or after reboot?
Click to expand...
Click to collapse
The original thread stated it had to be done every time, but mine has stuck since I changed it using the method here: http://forum.xda-developers.com/showthread.php?t=700601&highlight=battery.
One other thing to note: If you download the app in the Market called "Network", you can access the screen to change it without having to do the dialing or airplane mode thing. This would be the easiest way to do it if you happen to have to do it every time you reboot.
Final stats:
Uptime: 35:15
Awake Time: 5:15
This is about twice as good as I was getting before.

Those with great batt life, Things to tweak to improve runtime?

So based on many of the posts I've seen here, my Atrix battery is severely lacking. Last night I went to bed with it at 30% and forgot to plug it in. This morning I woke up 8 hours later and it was down to 5%.
Typically I will uplug around 11am and will need to plug back in by about 1am, thats with mostly just texting and checking a few emails.
I'm sure there are more settings that need adjusting, just curious what those are coming from the people who are claiming 24+ hours of use per charge? Also trying to pinpoint if maybe my phone is a dud since after 2-3 weeks the battery life actually seemed to get a bit worse and the phone feels more laggy.
Norcalz71 said:
So based on many of the posts I've seen here, my Atrix battery is severely lacking. Last night I went to bed with it at 30% and forgot to plug it in. This morning I woke up 8 hours later and it was down to 5%.
Typically I will uplug around 11am and will need to plug back in by about 1am, thats with mostly just texting and checking a few emails.
I'm sure there are more settings that need adjusting, just curious what those are coming from the people who are claiming 24+ hours of use per charge? Also trying to pinpoint if maybe my phone is a dud since after 2-3 weeks the battery life actually seemed to get a bit worse and the phone feels more laggy.
Click to expand...
Click to collapse
you have a defective device take it back and get a new one.
Try the hard reset, worked out well for me.
Sent from my Atrix
I am also interested in this. My battery life is "ok" most days, but nothing I would call great. I did a factory reset sunday and I think its slightly better. Yesterday I had a rogue app though for half the day, and today I downloaded that update and installed it. My phone gets pretty hot sometimes when I'm doing normal stuff.
Sent from my MB860 using XDA App
Probably a bad device, mine has amazing battery life, so much so that I dropped auto brightness and leave it at 100%. I still go to bed with 30+% to spare... And the upcoming update is supposed to enhance battery life? Crazy stuff...
Sent from my Atrix
I think this update has done something to help me. My phone is COLD right now. My phone has NEVER been cold. It must be burning less battery. Today should be a relatively normal day so we will see.
I have 1 hour 30 minutes of display time, and the phone has been off the charger for 9 hours 6 minutes. Still have 62% battery!
i'm amazed how quick people jump to the "you have a defective device" conclusion. battery life depends on a ton of things. how many widgets do you have? How often do those update? Does your weather update every 5minutes or 3 hours? how many email accounts do you have, how often do they sync? are you on data heavy apps like facebook or photo sites a lot? are you streaming a lot of media? how often do you use GPS, Wifi, or bluetooth? How many phone calls are you making.
If i'm streaming pandora all day, and using the phone a bunch i'll get 14 hours before im' below 20%. If i don't, i'll get over 24. Normal light use will put me over 30 hours.
battery is not some magical thing. it gets used in direct correlation of how much you ask your phone to do. If you're asking a lot, expect worse battery life.
So very true. Sorry for jumping to conclusions. That being said I'm a pretty heavy user and I can compare with my old Galaxy S. Atrix >>> Galaxy.
Sent from my Atrix
My phone has all mail & apps auto update off. Also have battery saver set to maximum battery in setup. 100% at 11 pm sits till 6 am and still at 97 % that morning. Run all day heavy use and at 5 pm still at 50%. Battery went thru the roof with those steps above.
I don't charge all night just for an hour or two in the evening with an old iphone charger at my office desk.
Sent from my MB860 using XDA Premium App
How do I do a hard reset? I only get about 15 hours on mine
Sent from my MB860 using XDA App
Hold down power and the down volume key I believe
Sent from my MB860 using XDA App
Battery improved a lot after update
Anyone else notice the battery lasting a lot longer after our update?
I unplugged my phone this morning at 7:30am this morning and it is now 9:30pm. Battery is down to 50%. That's 14 hours..not too bad. I'll explain my usage below.
My usage includes 20 minutes of internet radio in the morning through the tune in radio app. sent/received about 50 texts total through the day. Beautiful weather widget is set to refresh on every time i unlock. Gmail and work email is set to push with contacts/email/calendar sync. Wifi and GPS on the "on" setting. I do have a wifi connection at so...i'm connected for at least 6 hours today. I do have motoblur running the facebook feed. Also using the google news/weather widget. Also have smooth calendar widget running. Display is set to manual at about 20% brightness as well.
Before the update, i was usually down to 20-30% with similar usage.
Im at 50% right now, phone has been unplugged for 14hrs 49mins, with 1hr 49mins display time. And I haven't downloaded the update yet. My brightness is at about 30% and im using the maximum battery saver setting. I've been using it pretty regularly too. Beautiful widgets updates on unlock, engadget widget updates once an hr, facebook and twitter update when I open them, and my gmail and 2 yahoo accounts update every hr.
Sent from my Atrix using XDA App
sipjca said:
Hold down power and the down volume key I believe
Sent from my MB860 using XDA App
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That didn't work. Anybody? How do I hard reset?
Sent from my MB860 using XDA App
i am getting amazing battery life after the update (battery was already impressive even before the update). showing over 40% right now:
unplugged 21 hrs 11 min
voice calls 30 min
display 2 hrs 25 min
bluetooth was on for about an hr, gps is always on, display is set at automatic.
locked bootloader or not, this is pretty much the best smartphone i have ever owned.
cla2000 said:
That didn't work. Anybody? How do I hard reset?
Sent from my MB860 using XDA App
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Got this from motorola's site.
To perform an External Manual Reset of your handset to restore to factory settings, read instructions below and then perform.
1. Power off the phone, press and hold volume down button, press power button.
2. Screen will come up with "Fastboot", press Vol down key to cycle through choices until you get "Android Recovery", then press Vol up key
3. Wait for the "triangle ! / Android" screen then go on to step 4
4. Tap on bottom right corner of the screen (may take a few times). a menu will come up
5. Tap on "wipe data/factory reset", and tap OK. Another Confirmation screen will come. Tap Yes and OK
6. After userdata is cleared, the "reboot system now" option will be highlighted by Default. Tap OK.
7. Phone will reboot to initial setup MOTOBLUR screen.
I just don't understand.. I installed the new update and my battery life has been the same. Today I had 10 hours of use before it died. I'm a pretty heavy user and had about 3 hours of display time with a combination of GPS navigation, constant twitter updates, web browsing, gtalk, sms, no phone calls..
aballz said:
Got this from motorola's site.
To perform an External Manual Reset of your handset to restore to factory settings, read instructions below and then perform.
1. Power off the phone, press and hold volume down button, press power button.
2. Screen will come up with "Fastboot", press Vol down key to cycle through choices until you get "Android Recovery", then press Vol up key
3. Wait for the "triangle ! / Android" screen then go on to step 4
4. Tap on bottom right corner of the screen (may take a few times). a menu will come up
5. Tap on "wipe data/factory reset", and tap OK. Another Confirmation screen will come. Tap Yes and OK
6. After userdata is cleared, the "reboot system now" option will be highlighted by Default. Tap OK.
7. Phone will reboot to initial setup MOTOBLUR screen.
Click to expand...
Click to collapse
Thx. Will this delete the pics and vids on my phone?
Sent from my MB860 using XDA App
The last update seems to improve my batt life also. I would say about 15% more.
Sent from my MB860 using XDA App

Battery usage resetting itself ?

This has just started happening for me after about a couple weeks of use my battery usage stats days hours minutes are no longer being remembered after I power off so I have no idea after a full charge how long its been running down, if I check those stats its starting from 0 seconds every time I power on not just after a full charge.
This is on stock with only a few apps installed not unlocked or rooted have also done a reset but it didn't make a difference.
Any ideas ?????

[Q] Battery Drain When Powered Off

Anyone else encountered this problem ?
I've had my Nexus 4 for 3 days now.
I turn my phone off every night. So two nights for this phone. Each time I have turned it off it has been fully charged, with the battery indicator and a third party app both showing 100 %. The next morning (about 8 hours later) I'm finding the battery has dropped to ~85%, so losing ~2% per hour when powered off.
Anyone else encountered this or know how to deal with it (before I contact Google)
Note - to power off I press the power stud until the Power Off menu appears, select Power Off, then click on OK to shut the phone down.
This is with Android 4.2.1
It takes power to turn the phone on. 15% might be a little much but it is not unlikely.
Sent from my Nexus 4 using Tapatalk 2
15% does sound a little high. OP, how's the battery life during daily/normal usage?
tengen said:
15% does sound a little high. OP, how's the battery life during daily/normal usage?
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Battery life has actually been decent, I think I'm getting better usage than my old HTC Desire Z with extended battery. I'm not a heavy user, though I have been using it for music at work.
Hi
dapprman said:
Anyone else encountered this problem ?
I've had my Nexus 4 for 3 days now.
I turn my phone off every night. So two nights for this phone. Each time I have turned it off it has been fully charged, with the battery indicator and a third party app both showing 100 %. The next morning (about 8 hours later) I'm finding the battery has dropped to ~85%, so losing ~2% per hour when powered off.
Anyone else encountered this or know how to deal with it (before I contact Google)
Note - to power off I press the power stud until the Power Off menu appears, select Power Off, then click on OK to shut the phone down.
This is with Android 4.2.1
Click to expand...
Click to collapse
It takes a huge amount of battery power to start the phone from complete off, this also skews the first reading of the battery voltage as it will be lowered by the draw of power to start the phone so the indicator will read lower than it's true capacity.
The best solution is just put your phone in airplane mode at night, and turn airplane mode off in the morning, this is more power efficient than shutting the phone down using "power off", and you shouldn't see any battery drain apart from a percent or so doing this.
Regards
Phil
You can tell you guys never turn your phones off Starting up should have no battery drain - never been an issue on any of my previous phones and PDAs (last one also being Android).
I rang Google and they had never seen it before but recommended draining then fully charging the battery.
Friday night I made sur it was fully charged before unplugging and shutting down - next morning on turning on - 99% - result. Saturday/Sunday the same (note SAturday i fully drained then recharged the battery). This morning boots up with just 82%.
Looks like either it can't work out when it's fully charged, else there's some disharge mechanism in place to protect the battery and that's causing me issues.
It probably wasn't really at 100% even it was reporting as such. The reporting is broken. So when you rebooted you saw the real battery level.
Sent from my Nexus 4 using xda premium
I was just about to start a thread on this and then saw this thread here. So I'll ask here. I travel overseas a lot. So while I am on the plane I plug the phone in while off to charge it. I hit the power button occasionally to check the charge and when it shows "Full" I unplug it and throw it in my bag.
2 days later, I come back to the US and turn the phone on and the battery is usually below 50% even though it stated it was fully charged when I unplugged it.
So how does the battery drain if the phone is off?
I just sent my first Nexus 4 in for RMA on this very issue (if left for long enough it would just fully discharge), got the replacement on Friday, did a charge cycle, charged the phone fully up whilst off, took it off the charger (the official Nexus charger btw), and let it sit for the last day, just turned it on, and it's at 60%.... W T F !!!
This is sooo totally bizarre! I can only assume that this is common to most Nexus 4 (what are the odds of me getting two bad ones - direct from Google - with the exact the same issue?), and that people just aren't noticing, as most people don't leave their phones off after fully charging, and thus just never notice, as the battery behaves perfectly normally under usual use.
I would gratefully appreciate it if people could put this to the test, so I know whether or not to RMA the second device or not....
dapprman said:
Anyone else encountered this problem ?
I've had my Nexus 4 for 3 days now.
I turn my phone off every night. So two nights for this phone. Each time I have turned it off it has been fully charged, with the battery indicator and a third party app both showing 100 %. The next morning (about 8 hours later) I'm finding the battery has dropped to ~85%, so losing ~2% per hour when powered off.
Anyone else encountered this or know how to deal with it (before I contact Google)
Note - to power off I press the power stud until the Power Off menu appears, select Power Off, then click on OK to shut the phone down.
This is with Android 4.2.1
Click to expand...
Click to collapse
Are you using a custom rom, maybe its only sleeping.
Can't speak for the OP - but for me, no on both devices - totally stock. The latest one, box fresh on Friday! Also, the phone is most definitely OFF, and not just sleeping, ie, I press the power button & choose the "power off" option from the pop up. Unfortunately there's no way to really test this, by pulling the battery...
knowayback said:
Can't speak for the OP - but for me, no on both devices - totally stock. The latest one, box fresh on Friday! Also, the phone is most definitely OFF, and not just sleeping, ie, I press the power button & choose the "power off" option from the pop up. Unfortunately there's no way to really test this, by pulling the battery...
Click to expand...
Click to collapse
Why not just leave it charging when it's off..
steviewevie said:
It probably wasn't really at 100% even it was reporting as such. The reporting is broken. So when you rebooted you saw the real battery level.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Nah - I tested it multiple times on my first phone. One time I left it for over two days and the battery went from "reporting 100%" to being under 10% whilst turned off!! Also on all the charges - I deliberately would leave the phone on the charger for multiple hours, even after it was reporting 100%, as I had the same suspicion. Often I'd leave it to charge overnight...
I have never had this issue with any other phone, or with my Nexus 7 (which I have subsequently tested in this respect, and it is perfectly capable of holding a charge whilst off)
---------- Post added at 07:14 PM ---------- Previous post was at 07:10 PM ----------
joshnichols189 said:
Why not just leave it charging when it's off..
Click to expand...
Click to collapse
It's not so much that it's a practical issue, it's more that I'm worried that it might indicative of a larger hardware based defect, and I'm not happy spending my hard earned cash on faulty goods.
If it's a very common complaint/fault then I won't bother to RMA the second one, but if I'm just ridiculously unlucky, and very few people are experiencing this totally weird behaviour, then I'll take my chances on a third...
Also, I don't think it's too much to ask to be able to turn my phone off to prevent it from losing any more charge. I can think of a plethora of scenarios where this would be extremely useful...
I'm now convinced of three things.
1. Android 4.2.1 can not properly read the battery state
2. Shutting down the phone does NOT do that, but rather puts it in to a hybernate mode that still requires battery charge
3. There is a fundamental design flaw in the phone that part causes this.
Most mornings I find my previously shut down at 100% charged phone at only 80-85%, though occasionally it is as high as 97-99, but not often.
Oh and my ROM is stock, my phone is not rooted.
dapprman said:
I'm now convinced of three things.
1. Android 4.2.1 can not properly read the battery state
2. Shutting down the phone does NOT do that, but rather puts it in to a hybernate mode that still requires battery charge
3. There is a fundamental design flaw in the phone that part causes this.
Most mornings I find my previously shut down at 100% charged phone at only 80-85%, though occasionally it is as high as 97-99, but not often.
Oh and my ROM is stock, my phone is not rooted.
Click to expand...
Click to collapse
I agree on all counts apart from the first, as my nexus 7 and my Mum's Nexus 10 behave totally normally in this respect, both on 4.2.1 and 4.2.2 (both stock/unrooted, although the Nexus 7 was rooted/bl-unlocked for a time).
Also, I don't believe it's a miss reading of the battery state, as I often leave the device charging for multiple hours after it reports 100%, by which point it simply must be fully charged. What's more - if you leave the device off for long enough it will fully discharge! The craziest thing is that the phone's battery seems to drain quicker when it's 'turned off", than when it's powered on and sleeping. Seriously WTF.
It must be something to do with either the LG hardware, or LG specific code in the Google ROM. Obviously the phone is incapable of properly shutting down, which is pretty crappy for a so called "flagship" device. As someone who likes to have full control of their device, I find it more than a wee bit irksome, that I don't have the ability to completely shutdown my phone! This is also where the irremovable battery is annoying, because there's no way to test whether it's a hardware or software issue, although I guess I could try a custom ROM and see if it still happens.... however I don't really wanna root & rom if I'm going to RMA it....
I'm really interested to know how many other people have this defect and don't even realise it, because their phone is either in use or charging! I find it hard to believe that I could be unlucky enough to have got two uniquely defective devices in a row...
I'd really appreciate it if people could check their devices for this issue, both on stock and custom ROMs, see if we can work out whether it's HW or SW related...
knowayback said:
This is also where the irremovable battery is annoying, because there's no way to test whether it's a hardware or software issue
Click to expand...
Click to collapse
You could try powering it off with the bootloader. After you power off normally, hold power and volume down, when the bootloader menu comes on use volume keys to select power off and power button to confirm.
I'm hard pressed to believe the battery in my device would fully discharge if left off, when the phone arrived the battery wasn't dead, I got about three hours of solid tinkering before it died.
USSENTERNCC1701E said:
You could try powering it off with the bootloader. After you power off normally, hold power and volume down, when the bootloader menu comes on use volume keys to select power off and power button to confirm.
I'm hard pressed to believe the battery in my device would fully discharge if left off, when the phone arrived the battery wasn't dead, I got about three hours of solid tinkering before it died.
Click to expand...
Click to collapse
That's a good point. Mine came out of the box at about 80%.... hmmm. It could be that once it's first turned on it won't turn off again... this is such an odd issue! I shall try powering off from the bootloader next time, I'd still love to hear if other people's phones exhibit this anomaly though...
I'm aware that it's hard to believe issue, but there's only one way to find out...
I'm also very curious to know if loading a custom rom might solve it. I'm far less concerned if it's a software issue, I just don't want to have spend £250 on defective hardware.
I'm 100% stock, no Custom ROM nor kernal (kernel?) and my phone WILL discharge if left unplugged and "off". Happens every time I come back from overseas. Fully charge it up on the plane (even left the phone on but in airplane mode to 100% thinking that it was a misread of the battery level when the phone was "off") and still the same issue... turn it on a few days later and the charge is down to 75% or so....
I thought I was losing it... but I'm not the only one...
usafle said:
I'm 100% stock, no Custom ROM nor kernal (kernel?) and my phone WILL discharge if left unplugged and "off". Happens every time I come back from overseas. Fully charge it up on the plane (even left the phone on but in airplane mode to 100% thinking that it was a misread of the battery level when the phone was "off") and still the same issue... turn it on a few days later and the charge is down to 75% or so....
I thought I was losing it... but I'm not the only one...
Click to expand...
Click to collapse
Ha - me too! With the first one, I actually went into a weird sort of denial, where I kept convincing myself that I must of got it wrong, it just seemed so absurd! Eventually I put it to the test (multiple times) and realized that my memory wasn't as bad as I'd been trying to persuade myself and the phone was in fact discharging when "off".
Anyone else?
Just got the update to 4.2.2 and have got my fingers firmly crossed that it's now a squished bug... although somehow I think it's more likely an LG/hardware issue...
What you could try to do it charge the battery to 100%, hold the power button for 10 seconds until it fully shuts itself off. Leave it overnight and see the battery level is at the next day.

[Q] Battery Stat/Graph Reset?

Yesterday I returned my N7 device because it won't turn on despite having around 80% on the battery the night before. I woke up in the morning to find that it won't boot anymore. I tried all methods like holding the sleep and volume down button for 30+ seconds, plugging it to the wall, and connecting to my laptop. I went back to the store to have it looked at, and since it has only been 10 days since I purchased it, they agreed to replace it with an available unit in their stock.
Now, with my new device, everything is well except that the battery gives inaccurate reading on the up time. The battery status/graph shows how long your device has been on battery, but fails to reset after charging. Suppose I have been using it for 22 hours, if you go to the battery details, it will show 22 hours of use, however, I believe that if you charge it, it will be set back to zero. In this case though, it continues from where it left off. Same with the screen time, it should be reset back to 0 after prolonged period of idle time, however, it continues from previous use.
Is there any way to fix this so I may get an accurate data on my battery activity? Thank you.
Sprogetti said:
Yesterday I returned my N7 device because it won't turn on despite having around 80% on the battery the night before. I woke up in the morning to find that it won't boot anymore. I tried all methods like holding the sleep and volume down button for 30+ seconds, plugging it to the wall, and connecting to my laptop. I went back to the store to have it looked at, and since it has only been 10 days since I purchased it, they agreed to replace it with an available unit in their stock.
Now, with my new device, everything is well except that the battery gives inaccurate reading on the up time. The battery status/graph shows how long your device has been on battery, but fails to reset after charging. Suppose I have been using it for 22 hours, if you go to the battery details, it will show 22 hours of use, however, I believe that if you charge it, it will be set back to zero. In this case though, it continues from where it left off. Same with the screen time, it should be reset back to 0 after prolonged period of idle time, however, it continues from previous use.
Is there any way to fix this so I may get an accurate data on my battery activity? Thank you.
Click to expand...
Click to collapse
One way is to download an app called ROM toolbox and then go to ROM management>Management tab>Wipe options>Wipe battery stats.
I'm not sure if it requires root.
Thank you. I'm sure to try this out. Do you have any idea why it's acting up?
Sprogetti said:
Thank you. I'm sure to try this out. Do you have any idea why it's acting up?
Click to expand...
Click to collapse
Well I can't really say since I haven't faced such a bug till now. But I think doing a hard reset fixes the issue because it's software related.(if the first method didn't work)
Sent from my Nexus 7 using xda app-developers app
Sprogetti said:
Yesterday I returned my N7 device because it won't turn on despite having around 80% on the battery the night before. I woke up in the morning to find that it won't boot anymore. I tried all methods like holding the sleep and volume down button for 30+ seconds, plugging it to the wall, and connecting to my laptop. I went back to the store to have it looked at, and since it has only been 10 days since I purchased it, they agreed to replace it with an available unit in their stock.
Now, with my new device, everything is well except that the battery gives inaccurate reading on the up time. The battery status/graph shows how long your device has been on battery, but fails to reset after charging. Suppose I have been using it for 22 hours, if you go to the battery details, it will show 22 hours of use, however, I believe that if you charge it, it will be set back to zero. In this case though, it continues from where it left off. Same with the screen time, it should be reset back to 0 after prolonged period of idle time, however, it continues from previous use.
Is there any way to fix this so I may get an accurate data on my battery activity? Thank you.
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It depends on your charging behavior. If you unplug it at 85%, for instance, then it should not be reset. Same with screen time.
Sent from my SCH-I545 using Tapatalk 4 Beta
najaboy said:
It depends on your charging behavior. If you unplug it at 85%, for instance, then it should not be reset. Same with screen time.
Sent from my SCH-I545 using Tapatalk 4 Beta
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Ah yes, exactly. I charged it again to full all the way and it did reset the status monitoring. Thank you!

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