Tablet battery life?

asked 2017-03-05 22:24:33 +0200

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updated 2017-03-05 22:25:13 +0200

RussH gravatar image

Originally there was some discussion about the poor tablet battery life but I don't believe it reached any conclusion. Anyone out there found a way to improve it? It's all that's stopping it from being an awesome device. There was some advice to disable the android compatibility service? Thoughts?

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Flight mode lets it survive for a small week. WiFi on and the battery is dead in a day or two, completely idle. A by now five year old Galaxy Tab manages, in the exact same conditions, to last three weeks and a good 6 days respectively. I know, because I checked. I'd love to find out a way to make the battery last longer, and find out why the battery life is so bad to begin with.

Disabling the Android support while it's not in use increases battery life a little bit, but it doesn't have a significant impact. WiFi on in flight mode somehow gives better battery life than WiFi on without flight mode, but it still isn't very significant. Every bit helps, though.

nthn ( 2017-03-06 00:09:54 +0200 )edit

It seems that the tablet is constantly running on high CPU load and is unable to enter deep sleep:

Alex ( 2017-03-06 01:52:18 +0200 )edit

Ahh thanks that looks like a good thread, will dig into it tomorrow

RussH ( 2017-03-06 02:40:29 +0200 )edit

I think going by the comments of that thread, the tablet does reach deep sleep mode, it's just the monitoring tools that don't take into account the CPUs that are turned off or the CPU that's downscaled. In any case my tablet is ice cold in the morning, which I doubt it would be if the CPU were really running at max speed.

nthn ( 2017-03-06 12:28:31 +0200 )edit

The linked threads point to the wireless driver hogging the CPU even whilst idle, possibly a bad driver but as we don't have debug symbols it can't be progressed further. If there's any additional investigation been done into the bcm4330 driver please share!

RussH ( 2017-03-12 22:09:47 +0200 )edit