I've had my PRS-350 since Christmas but have only just started using it regularly now I've finished a big paperback book I was reading!
I work from home so it only gets used 2 or 3 times a week, but each time I come back to it the reader has lost most of its charge. It's been in standby mode for that time, which I would rather leave it in since it takes so long to boot up from switched off. But it's not uncommon that after three days it's completely discharged, totally, so that it even needs a few minutes plugged in before it comes back on again.
Furthermore, it won't charge in any way unless it's connected to a computer. If I try plugging it into a wall with my mobile phone charger (also micro-USB) it says that charging has been stopped. Same if I plug it into a powered USB hub while the PC is switched off.
This is what's making its power-loss so frustrating. There's no convenient time to charge it. But for me neither of these problems make sense are or acceptable in a device like this. It seems to me that the battery is meant to last 2 weeks, not 2 days, and that it's meant to be able to be charged from a power socket, not just a PC.
Hope you can let me know if I should be taking this back as faulty.