Standby Battery Drain

[lvmymoto]

I did a search and there are several battery draining threads, but this seems to be a little different than the others.

About 3 days ago, I noticed that the battery wouldn't even last a full day at work or through the night when it's on standby. It was plugged in over night, 100% charge in the morning. Unplugged it, checked my e-mail and then set it down to go to work. So it was at about 98% when I left, 10 hours or so later, it was completely dead! Charged it back up to about 75% that night before I went to bed. Unplugged it again, and when I got up in the morning it was dead again! That is so weird! I used to be able to go days without charging it.

It is the Tab S 9.7 with AT&T LTE, and I leave cell and wifi on pretty much all the time, but never had an issue until now. I checked the battery settings, but since it dies completely, it doesn't show what was running before I restarted. Annoying. I also went through and un-installed some apps I either don't use or are notorious for battery usage, like Samsung+. Also cleared the cache. Nothing has helped so far...

Any thoughts or suggestions? Thanks!

 

[NeilCBennett]

Try setting wifi to off on sleep. Go to wifi see the link top left for more, then check wifi on in sleep and scanning modes, check to ensure these are not set to be on all the time, let us know your experience. Hope this helps.

Posted via the Android Central App

 

[lvmymoto]

Try setting wifi to off on sleep. Go to wifi see the link top left for more, then check wifi on in sleep and scanning modes, check to ensure these are not set to be on all the time, let us know your experience. Hope this helps.

Posted via the Android Central App

Yeah, I'll give that a try. I was thinking about turning it to Airplane mode too and see if the drain is the same. That way I could eliminate data/network completely from the equation. Thanks for the input!

 

[lvmymoto]

So it looks like it is a network thing. Put the tablet in Airplane mode, and then just turned wifi on and battery is back to normal. Really weird, not quite sure why all of a sudden the LTE network is having issues.

Check out the battery usage graph:

So from the 7pm on the left that usage is almost entirely with the tablet in standby. And it just drops like a rock! Weirdly enough it doesn't say anything is being used abnormally in the battery percentages, just all the normal stuff. Then when it levels off is when I put it in Airplane mode. The next drop is me actually using it and then it in standby mode for the next day.

I guess a factory reset is in my future...

Posted via the Android Central App

 

[slinky826]

I was having same issue with the wifi only version. Then remembered to check wifi off when sleeping option. Thing barely drops now when not in use.

Posted via the Android Central App

 

[lvmymoto]

Interesting. So does that mean that you don't get any notifications or anything until you wake up the tablet and it connects to a network? I'll give it a try though...

Posted via the Android Central App

 

[LeLutin]

When I bought the tablet standby battery life was excellent. (<1% drop overnight) At some point I started having the same issue described here.

I had already tried your suggestion, setting Keep Wifi On During sleep to "Never" or "Only when plugged in" yet it didn't work for me. Before, when I had no excessive battery drain, I would get all my notifications (email etc.) the moment I woke up the tablet and it connected to WiFi. Now, regardless of the WiFi settings, I am getting notifications instantly whenever I receive an email.

I am now testing the Airplane mode with WiFi turned on yet notifications still seem to come through.

Btw: WiFi Scanning is set to "Only when WiFi is on".

Any other suggestions?

 

[LeLutin]

When I bought the tablet standby battery life was excellent. (<1% drop overnight) At some point I started having the same issue described here.

I had already tried your suggestion, setting Keep Wifi On During sleep to "Never" or "Only when plugged in" yet it didn't work for me. Before, when I had no excessive battery drain, I would get all my notifications (email etc.) the moment I woke up the tablet and it connected to WiFi. Now, regardless of the WiFi settings, I am getting notifications instantly whenever I receive an email.

I am now testing the Airplane mode with WiFi turned on yet notifications still seem to come through.

Btw: WiFi Scanning is set to "Only when WiFi is on".

Any other suggestions?

Update: airplane mode does solve the issue.

Not using LTE atm so that's a decent solution until this bug gets fixed!