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[Q] battery use - standby

I charged my grab to 100% and put it to sleep, 13 hours later I was down to 53% battery left. Is that much battery drain typical for standby/sleep?

I also saw the same thing when I got my g tablet over the weekend with Viewsonic's updated TnT. I flashed it to the TnT lite 4.2.3, but it seems still the case.

joe2262 said:
I charged my grab to 100% and put it to sleep, 13 hours later I was down to 53% battery left. Is that much battery drain typical for standby/sleep?
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Unfortunately that seems to be typical for the gtab. Other tablets drain much more slowly. I have been very happy with my gtab aside from the standby battery drain.

Looks like I'll be shutting down instead of sleeping overnight.

http://forum.xda-developers.com/showthread.php?t=862438
Not the first time this behavior has been noted....

I ran VEGn then TNT 4.2.3 and was amazed at how quickly battery drained while sleeping. I just updated to Clems kernel and it is much much better. I don't think it was actually sleeping before, just powering off the backlight/screen...

I agree, I don't think the sleep is actually sleep. Yesterday, I put my gtab to sleep (from the power menu -> sleep). and I still heard a new email sound, running tnt4.2.2, the tab was probably still running all the background services.
Try it yourself.. put it to sleep and send a gmail to yourself (from a pc or phone)..
EDIT: My wifi is set to NEVER, it may be the cause?

I've been thinking about it and wonder if it's the email program? It wants to check the mail every hour which means re-establishing a wifi connection, get the mail then shut off the wifi. And this happens every hour. To bad the gtab isn't like my iPod touch which lets me retrieve the mail manually. Might have to find an alternate email program, any recommendations?

Just wondering. Have any of you tried removing the cellular stand by apks like in this thread http://forum.xda-developers.com/showthread.php?t=855812? Or do the roms you have already not have them? I just ordered a gtab and battery is a big thing for me. I hope this is something that can be fixed.

s14tam said:
Just wondering. Have any of you tried removing the cellular stand by apks like in this thread http://forum.xda-developers.com/showthread.php?t=855812? Or do the roms you have already not have them? I just ordered a gtab and battery is a big thing for me. I hope this is something that can be fixed.
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I don't see them in stock tent.

well in that thread, they note that the stock tnt and tnt lite doesn't have it. CM and Vegan might

Last night I charged my iPod touch too 100% and set the email to hourly and 10 hours later it still had 96%. I also tried shutting the grab completely off overnight and sure enough there was no battery drain.

I think 4% drain per hour during standby is crazy. It really should be around 1% at the most. My HTC HD2 on android use to use a lot of power during stand by until they figured out how to scale the processor speed down when idle. I hope they can do something similar for the G Tab. I suppose it would take some knowledge of how modify the kernal to do so.

I don't have any roms but just the enhancement pack and same thing the battery drains fast if I leave it just sleeping. I have learned to just turn it off when not using it.

kjmott said:
I don't have any roms but just the enhancement pack and same thing the battery drains fast if I leave it just sleeping. I have learned to just turn it off when not using it.
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Well, I think I found the issue - at least in VegaN. The WiFi adapter was running at 100% even while sleeping. Just went to:
Settings -> Wireless settings -> then hit the menu button, and choose "Advanced", then select "WiFi Sleep policy" (It was set to NEVER!)
I chose "Never when plugged in".
I just put it to sleep. We'll see what happens.....
FYI: Vegan has an app built in called "Spare Parts" - That's what told me that my WiFi had been on 100% of the time - even while sleeping!

DudeInMyrtleBeach said:
Well, I think I found the issue - at least in VegaN. The WiFi adapter was running at 100% even while sleeping. Just went to:
Settings -> Wireless settings -> then hit the menu button, and choose "Advanced", then select "WiFi Sleep policy" (It was set to NEVER!)
I chose "Never when plugged in".
I just put it to sleep. We'll see what happens.....
FYI: Vegan has an app built in called "Spare Parts" - That's what told me that my WiFi had been on 100% of the time - even while sleeping!
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I've had my gtab set to shut off the wifi when it's sleeping for several weeks and while it does help there is still way too much battery drain while it's off. I'm absolutely positive my wifi is off when sleeping because I have to wait for it to start back up and connect to my network after I power it on.

tjrhine said:
I've had my gtab set to shut off the wifi when it's sleeping for several weeks and while it does help there is still way too much battery drain while it's off. I'm absolutely positive my wifi is off when sleeping because I have to wait for it to start back up and connect to my network after I power it on.
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I think that's what's causing the high drain. The email, weather and or news apps poll at least each hour requiring the gtab to start and stop the wifi all night when it should be sleeping?

joe2262 said:
I think that's what's causing the high drain. The email, weather and or news apps poll at least each hour requiring the gtab to start and stop the wifi all night when it should be sleeping?
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I've tried it both ways and get much more battery drain while sleeping than I'd like. It doesn't appear to start and stop the wifi as you suggest since my email, weather, etc. don't update until I turn it on and my wifi starts up and connects.

Are you running stock TnT?

I'm running vegan 5.1.1

Possible Screen of Death Workaround

Let me state upfront that I never did get SOD or reboots more than once every couple days. SOD pretty much always happened overnight while charging.
I noticed that ever since I enabled Stay Awake (Settings -> Application -> Development) I havent had a single SOD since. There is a lot of debate as to what exactly is the cause of the SOD, all of which pointing to something going wrong while the phone is sleep. So it kind of makes sense that the phone wont get SOD if it doesnt sleep. This of course doesnt help anyone who gets the crash while off charger but I thought id post this anyone to see if it yields results for anyone else.
Havent had a reboot since either but that is most likely just coincidence.

I did the same thing, no SOD after charging overnight however I do get SOD throughout the day sometimes.

I upped my minimum Mhz by one step with SetCPU, fixed the problem for me.

I have never had any SOD or restarts on mine. I have stock rom and not even rooted. I got my phone within first week after launch. Then just before 3 days I installed LOOKOUT (Before I was using AVG pro) and within 3 days 1 reboot and 2 SODs. Though these things don't bother me as much.

rome425 said:
I upped my minimum Mhz by one step with SetCPU, fixed the problem for me.
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Bingo! As many have said. Not all chips are created equal. That combined with a battery swap fixed my issues.
On the main screen and in profiles stop using the min settings in SetCPU if you have reboots and freezes.

regP said:
Let me state upfront that I never did get SOD or reboots more than once every couple days. SOD pretty much always happened overnight while charging.
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same with me.. i wake up in middle of night to check the time and have to do a battery pull..

[Q] TF101 Prime 1.9 Wifi Sleep

Since I don't have permission to post in development forums, I will have to ask here. Just NVFlashed to Prime 1.4 then upgraded to 1.9 and everything works great except now I notice that the Wifi to shutoff when screen is off does not appear to work. I know this was working in the stock ROM. Is this a known issue or something particular with mine?

meatservo80 said:
Since I don't have permission to post in development forums, I will have to ask here. Just NVFlashed to Prime 1.4 then upgraded to 1.9 and everything works great except now I notice that the Wifi to shutoff when screen is off does not appear to work. I know this was working in the stock ROM. Is this a known issue or something particular with mine?
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Was about to ask the same question. Happening to me as well. I notice my tfiner goes into deep sleep and still the wifi is on. I have to turn off with the screen.
Sent from my Transformer TF101 using Tapatalk

Check wifi sleep policy.
Wireless & network> wifi disconnect policy> chose policy

baseballfanz said:
Check wifi sleep policy.
Wireless & network> wifi disconnect policy> chose policy
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I have the same problem and I have checked the sleep policy multiple times. I have even changed it to never turn off then back to off when the screen turns off then proceeded to reboot the device. I still have the issue though.

Yep, seems i am getting this same issue seems wifi is on all of the time.

Yep last night the battery in kb went from 65 - 3% in 10 hours while in sleep. Says 43% of battery use is wifi. I did read somewhere that it was said to be the latest google maps update causing it but I uninstalled those and it still does it. It does appear to be going on and off like some other people have describe. I am pining it from desktop and every other time it starts with 3500 ms ping time then the last 3 are normal.

meatservo80 said:
Yep last night the battery in kb went from 65 - 3% in 10 hours while in sleep. Says 43% of battery use is wifi. I did read somewhere that it was said to be the latest google maps update causing it but I uninstalled those and it still does it. It does appear to be going on and off like some other people have describe. I am pining it from desktop and every other time it starts with 3500 ms ping time then the last 3 are normal.
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And Today I fully charged both KB and Tablet then turned on airplane mode and left in standby all day. Its 8hrs of uptime and only 4% battery drop between both. Not a deal breaker or anything just want to let someone know before 2.0 comes out to see if maybe theirs an easy fix. I will ty to run fix permission in CWR and recheck.

Battery life is suddenly garbage

I don't know what happened, but lately my battery has been about 20% less every day I come home from work. Right now it was down to 9% after only being on for 1d3h, I'm used to getting over 2 days easy on a single charge. I don't think I installed anything recently, and this is running CROMI 3.2.2 with I think the Clemsyn 1.3-1.8GHZ kernel. Any ideas to figure out what's causing the drain?

berfles said:
I don't know what happened, but lately my battery has been about 20% less every day I come home from work. Right now it was down to 9% after only being on for 1d3h, I'm used to getting over 2 days easy on a single charge. I don't think I installed anything recently, and this is running CROMI 3.2.2 with I think the Clemsyn 1.3-1.8GHZ kernel. Any ideas to figure out what's causing the drain?
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You need to install "betterbatterystats" to find out what's the issue. Any changes in the way you sync email, messages? any app with location service turn on by default?? well, best bet is use the app and find out.

I'll check it out. I didn't change any syncing, the only change I've made is I started using GoogleNow a little more, but I don't think it would make this much of a drastic difference.

Probably a rogue app, as buhohitr said. Reboot two times, install BBS, reboot again, and sniff it out. The reboot number doesn't matter that much, but I strongly advise to reboot in between to see if that solves the problem altogether. If not, BBS has your back.

Noticed last night that installing multiple launchers with 3.3 CROMi is eating more battery.
For instance GO is running while APEX is active.
Each on average are stealing about 3.3%
I do like the switchable launcher feature in 3.3 a lot however.

Never mind. I just noticed that you run custom rom.
I had that problem before I upgraded to 10.4.4.25. The standby battery life was a total nonsense. It would drain in less than 2 days without me even touching the tablet.
Now with 10.4.4.25 I am on 8 and half days and still have 33%. Although they seem to screw up battery stats app in settings.

Well, I installed the battery app, and looks like it was draining at about 1% per hour today while it was sitting idle. Not sure if that's good or not, I had it sitting in balanced mode all day. I do know that I started reading on it when it was at 54%, after about 30 minutes I stopped reading and it was at 50%. I went to bed, went to work, and when I came home it was at about 35%. That just seems like a lot to me.

Not sure if related since your on custom rom, but randomly my battery lasted up to about a day and a half with no use. Batterystatsplus said cell standby and maps was taking all of the power. Cell standby makes no sense and gps was turned off as well. I ended up resetting tab from the recovery menu because these rogue aps made zero sense. Back to 8 days of use.

winslomb said:
Not sure if related since your on custom rom, but randomly my battery lasted up to about a day and a half with no use. Batterystatsplus said cell standby and maps was taking all of the power. Cell standby makes no sense and gps was turned off as well. I ended up resetting tab from the recovery menu because these rogue aps made zero sense. Back to 8 days of use.
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Yep, Google Maps does that. To pretty much everyone.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

I had this problem but with stock 4.2. I narrowed it down to two widgets I had placed on my home screen. BBC news and Appy Geek. I don't know which was was the culprit. Removing them solved my issue completely.

Tablet+Dock Standby times

I've been noticing on the latest stock rom, the standby time for the tablet with the dock is like 2-3 days. However, in cm 10.1, I can go 10-20+days. I open them like I usually do and update them once every few hours to keep them up to date. The settings are the same for the most part. However, for some reason, the stock rom really drains the battery for the tablet when docked. Anyone else notice the same?

dude2k5 said:
I've been noticing on the latest stock rom, the standby time for the tablet with the dock is like 2-3 days. However, in cm 10.1, I can go 10-20+days. I open them like I usually do and update them once every few hours to keep them up to date. The settings are the same for the most part. However, for some reason, the stock rom really drains the battery for the tablet when docked. Anyone else notice the same?
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Try this, go into wifi settings --> advanced --> set "Keep Wifi-on during sleep" to "never". This way your wifi will turn off while the tablet is sleeping.

dude2k5 said:
I've been noticing on the latest stock rom, the standby time for the tablet with the dock is like 2-3 days. However, in cm 10.1, I can go 10-20+days. I open them like I usually do and update them once every few hours to keep them up to date. The settings are the same for the most part. However, for some reason, the stock rom really drains the battery for the tablet when docked. Anyone else notice the same?
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10-20+ days? On CM10.1? Pics or it didn't happen.

buhohitr said:
Try this, go into wifi settings --> advanced --> set "Keep Wifi-on during sleep" to "never". This way your wifi will turn off while the tablet is sleeping.
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Even with this setting, the standby time with dock was always less than without dock for me. If I separate tablet and dock, they would survive for a week (if I didn't use them daily).
For some reason, when connected to the computer without dock, the tablet charges (very slowly). When connected through the dock, the dock battery is empty within a few hours.

dude2k5 said:
I've been noticing on the latest stock rom, the standby time for the tablet with the dock is like 2-3 days. However, in cm 10.1, I can go 10-20+days. I open them like I usually do and update them once every few hours to keep them up to date. The settings are the same for the most part. However, for some reason, the stock rom really drains the battery for the tablet when docked. Anyone else notice the same?
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Click to collapse
And to me happens the same problem, I charge my tablet on Monday and followed every day how much is spent and on Thursday was 85% and on Friday totally empty. It all started to happen after Updates to 4.2.1. Does anyone know what to do

mastercard25 said:
And to me happens the same problem, I charge my tablet on Monday and followed every day how much is spent and on Thursday was 85% and on Friday totally empty. It all started to happen after Updates to 4.2.1. Does anyone know what to do
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Make sure nothing is draining battery i.e GPS and WiFi so the tablets entering deep sleep. Brightness as low as you can stomach.
If not then try a full reformat with all your stuff backed up.

It has always been 3 days maximum for me. Maybe I use it a lot more often or extensive than you do, but 10-20 days and over sound like paradise to me.

MartyHulskemper said:
It has always been 3 days maximum for me. Maybe I use it a lot more often or extensive than you do, but 10-20 days and over sound like paradise to me.
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I think he just exaggerated! maybe just 3-4 days with wifi/gps disabled.

The last time I charged mine was uh, let me check...
4d, 5h, 3m, 40s. Has been in my bag without using since then, on standby.. Battery: Tab 87%, Dock 92%. Mine truly does make it about 20 days in total if I don't use it.
You obviously have something running in the background. Maps, GPS, Location services (yes, that drains even with wifi off), a widget...