Books indexing problem caused by the device.
 

So.. I've been using my Kindle 4 for few months. Everything was going smoothly till last Monday. I copied two books downloaded from TPB (as usual). My battery started to die within a day instead of couple of weeks. I googles the problem and found out that the cause of that is that books are stuck in indexing. The problem was either in book files or my device. Although, i copied the same files to another Kindle and they would be indexed within a minute. So: the problem is in the device. I rebooted my Kindle few times but it doesn't help. Any thoughts?