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Bought bv8000pro at Christmas..suddenly battery life.is terrible..losing roughly 20% battery life within 2hrs of being idle...please help..at this rate it won't even last an 8hr work day.
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Hi there!

Just flash your device to the latest firmware version (20180124) and the abnormal battery drain issue will be fixed.

Flashing tutorial:
viewtopic.php?f=192&t=319505

Flash files:
viewtopic.php?f=192&t=213272

If you don't want to flash you can also update to that firmware version by doing an OTA update, but the problem may not get fixed by that.

Remember also to perform a factory reset after the update!

My.apologies for not being so clued up...performed ota update and battery is now worse...do I now need to do factory reset?..how do I do that without losing all my information on phone?? Tutorial??

Rgeorge wrote:

My.apologies for not being so clued up...performed ota update and battery is now worse...do I now need to do factory reset?..how do I do that without losing all my information on phone?? Tutorial??

It's not possibile: after a factory reset you'll lose all your infos, but you can retrieve some of them using the google automatic backup feature (you'll be prompted to load your previous configuration when booting the factory resetted phone for the first time).

To perform a factory reset, go to Settings -> Backup and restore -> Factory reset.

If your battery problem doesn't get solved, you'll have to FLASH the new firmware. OTA update sometimes is not reliable.

blackview_admin wrote:

If you don't want to flash you can also update to that firmware version by doing an OTA update, but the problem may not get fixed by that.

And not all phones get that update. Mine still does not show it.

Mike! wrote:

blackview_admin wrote:

If you don't want to flash you can also update to that firmware version by doing an OTA update, but the problem may not get fixed by that.

And not all phones get that update. Mine still does not show it.

Exactly.

After 20180307 update the battery is discharged very quickly and the charge lasts a day, before this did not happen, it would be possible to change battery if in the future there was a need?

AleP wrote:

After 20180307 update the battery is discharged very quickly and the charge lasts a day, before this did not happen, it would be possible to change battery if in the future there was a need?

Just downgrade your device to your previous working firmware and everything will be ok. Remember to perform a factory reset after that.
Please refer to this topic:
viewtopic.php?f=191&t=369542