Hi All, I bought a USB wall charger to charge my eReader as I don't always have access to the internet, I'm pretty sure I have wasted my money, as I had it charging this way for 3 hours, unplugged it, then was told by the eReader that the battery was low. Are there settings I can change to charge through the wall charger or do I have to do it through the computer.

Any help or advice would be appreciated.