Has anyone experiencing a massive battery drop after using tomtom? After using tomtom I closed it and it appeared to be on the bottom of my screen.. after clicking on it.. it bring up the navigator title at the top with the today screen.. and wouldn't shut down.. after i soft resetted it.. the battery dropped from 60% to nearly 15%
Has anybody experienced this?
Yes, using the GPS is a known battery drain issue, there is nothing to do reduce battery drain while GPS is running.
hollywould said:
Yes, using the GPS is a known battery drain issue, there is nothing to do reduce battery drain while GPS is running.
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when i use mine in the car I just plug it in to reduce battery drain
seriously though yes the battery drains fast with GPS, but I've also noticed it drains fast when using my phone as an MP3 player... I was using it friday with full charge and only got about 6 hours out of it
thanks for the quick responses.. but this was a period of maybe 20 minutes.. seemed to me like a glitch or something..
the tomtom icon appeared at the bottom right hand corner.. and whenever i tried accessing it.. it wouldnt come up.. the light wasnt flashing amber either..
GPS, as suggested by This thread, is one of the problems.
I find that 3G eats up battery. Forcing your phone to disconnect with 3G after a length of certain minutes can save your battery when your note using 3G.
Is anyone else having bad battery life after the update? Cell Standby and Phone Idle used to draw most of the power before the update, now they're low on the list however Android OS is eating all the juice now. Android OS gets up to almost 70% usage overnight and the battery drains a good 30% or more just sitting idle for 6 hours.
I installed a program called watch dog and it's telling me that "Base System" seems to be the culprit with lots of CPU use, particularly when the phone is idle. I've tried a variety of things like uninstalling recent apps I downloaded, disabling the 4G and 3G radios, trying airplane mode, changing settings, etc. and nothing has made a difference. Really want to avoid trying resetting to factory default.
Have you tried recalibrating the battery or tried bump charging?
Sent from my SCH-I510 using XDA App
Since I use my nav dock in my truck to stream Pandora over my stereo, it gets charged several times a day; however, Android OS is now my big drain as well, where it used to be idle or screen using the most. Since unplugging exactly two hours ago, it has drained down to 70% on the stock battery. (I only use my extended battery when I will be away from a charger for a long time. Makes the phone too thick for my pocket to be comfortable.)
On a seperate note, Google Voice now hangs my screen as well when listening to voicemail. Hey, at least I don't get the random reboots and power ups... :what:
Sent from my Xoom using Tapatalk
I doubt calibrating will fix the issue because I don't think that's the problem. A system process appears to be hanging and causing the CPU to run constantly. Maybe a bad update install?
Either way I used to get much better battery life before the update. Never had any of the random reboots or many issues with data like others.
My battery life seems somewhat worse after the update. Everything else seems somewhat improved.
My battery seems about the same if not slightly better after the update.
I do a few things to conserve battery which really conserve the battery.
1. 4G off unless I need it.
2. Battery mode set to 'maximum battery saver'.
3. WiFi sleep policy: When screen turns off (although I think the maximum battery saver will turn it off automatically)
4. Display brightness: 0% unless I need it.
Hi all
I tried to cut battery consumption down as much as possible while phone is in standby/deep sleep.
I now manage a drain of around 1%/h (BetterBatteryStats actually reports 0.9% per hour).
This is with Wifi on, everything else turned off. I have my CPU undervolted by -100mV and am using perseus kernel with RipperRom, Radio is currently LL3. The signal coverrage in my area is good (3-4 bars).
What is your drain when the phone is not in use? Best way to check is to fully charge and unplug the phone before going to bed and leave it alone until the morning. You can either calculate amount of battery drained per hour yourself or just use BBS.
Please also mention your configuration (Rom, Kernel, Radio, Undervolting, what Antennas were active during standby and how your reception is)
mine's about the same, 0.8 - 0.9%/h on a good night. CPU undervolting won't help much as the phone hsould be in deep sleep most of the time (CPU UV is only active when the phone is not in deep sleep). my wifi is on 100%, i have a bunch of push accounts, a few pull. using ripper, perseus, default telstra modem, good reception
Not rooted, but overnight mine tends to drop around 5-8%, this is with everything off. I had the HTC Sensation prior to this phone and that practically lost no battery life when on stand-by! So am a little surprised it drops quite a few % from stand-by mode.
yeah that's pretty bad, I would get BetterBatteryStats and work out what's chewing up your battery. I'm pretty sure you don't need Root unless you want to look at the network or process stuff..
I'm using Ripper ROM V8, Latest perseus kernel and LL5 Modem.
I got 3% drain overnight (9.5hours) with wifi and data off.
Sent from my GT-I9305 using xda app-developers app
c.r.e.a.m.36 said:
Not rooted, but overnight mine tends to drop around 5-8%, this is with everything off. I had the HTC Sensation prior to this phone and that practically lost no battery life when on stand-by! So am a little surprised it drops quite a few % from stand-by mode.
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It might be that location reporting is turned on. You should check if google maps has "Report from this device" activated. If so, it will constantly wake you device and report your location to who knows where. I have turned it off and my battery life has vastly improved
However, 5-8% in a time span of around 8h seems normal. You will only achieve less if u switch off wifi and data
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...
i don't know if it was always this bad but i don't think so... just noticed that my phone drains battery like crazy on idle.
it was my main phone for 3 years so it was not staying idle as much but i think i would notice it from overnight drain if it was this bad.
i charged it to 80% then found it at 15% after 12-13 hours, i didn't touch it at all... i'm losing about 5% per hour
tried factory reset, debloating evenwell crap, uninstalling google apps that i don't use as well and didn't install anything yet the drain is still same. installed accubattery and it shows over 120mA consumption on idle, screen off... my new main phone drains around 20mA for example.
https://imgur.com/L16JjXW
this problem started after a battery replacement i think. the original battery was dead, it was rebooting at around 50% if i play a game or launch the camera... i had to replace that battery and those problems are solved now.
according to accubattery(it's pretty accurate imo) the capacity of the new battery is around 2650mah
and side button flex is replaced since my power button was faulty. did the service do something wrong? is there anything to explain this battery drain? maybe they didn't reapply a new thermal paste for example so cooling might be worse but i believe it shouldn't matter on idle. and i can't think of anything else...
edit: tried airplane mode and idle consumption was 22mA, anyone else had a similar issue?
edit2: tried mobile network active but wifi turned off, still 22mA i think wifi is draining like 100mA on its own...
okay i'm like 99% sure its a wifi problem.
when i turn off wifi the drain is normal if i turn on a hotspot from my other phone and keep it reaaaally close then drain is normal again. but if i put it far away drains over 100ma again. even worse if i leave the room and there a wall between them.
also i can connect to my router's 5ghz band but it always disconnects, can't stay connected. aaand it can't see my other phone's hotspot at all if i turn on the 5ghz hotspot.
i hope they just didn't connect the antenna cables properly and didn't permanently damage anything, can badly connected antenna wires cause a problem like that? i wanna be sure before opening the phone. i don't have proper glue yet i'll have to spend some money on it. don't wanna waste it if it's not something i can fix by reconnecting the wires...