I'm seeing some pretty bad battery life with my Clara HD and I'm wondering what it is I'm doing wrong. From searching the forum and Kobo's help I've seen a few common suggestions:
- Turn off wifi. I already do turn off wifi, only turning it on when I need it and turning it off again.
- Don't turn the device off, just let it sleep (e.g. set the power-off timeout to "Never"). If I do this the battery life gets even worse, full charge to empty within a few hours instead of about a day most days. The best battery life so far has been with sleep and power off both set to 5 minutes.
- Train the battery (drain, charge, drain, charge). Been doing this basically as long as I've had my Clara! The battery drains, I charge it up to full before using it, then I normally don't plug it in again until it's drained. Which has meant I'm normally plugging it in once or twice daily.
- Turn off sleep cover support. I turned it off during initial setup and never turned it back on. I've also confirmed a sleep cover isn't still causing a problem: I can reproduce this without any cover on at all (but maybe there's a bug where the hardware is still being powered and polled?).
- Turn down screen brightness. It's normally down around 2%, even at night.
- Remove all the books and see if there's a bad book causing a problem. I don't quite get how having a book stored would cause a problem, but I have also deleted all books and seen the battery drain.
- Update firmware. I've updated at least twice since getting the Clara.
There are occasional times (just a few times in a few months) where I've read for a few hours then left the Clara sitting for 2 days and the battery has stayed full. But then the next time I pick it up it's back to draining within a day and I've done nothing but read (no adding or removing books, no flipping wifi on or off).