@Lima7: You don't supply much information to get an idea of what the problem might be. The battery running down by 50% in a few hours isn't absurd, it just depends on what you are doing.
So, the questions that come to mind are:
- What firmware version? Really, this should be in every problem report.
- What were you doing with the device? Reading, sleeping, powered off...
- If it is just sitting there, does it go to sleep?
- What type of books are you reading? Sideloaded or purchased, epub or kepubs or others.
- Do you use a sleep cover?
- Is automatic sleep enabled? How long?
- Is WiFi on?
- Is the automatic sync enable?
I feel like I've left something out, but that should be a start.
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