Originally Posted by GeoffR
When the manufacturers claim "4 weeks battery life" they mean 4 weeks if reading only 30 minutes per day. But how many would bother to buy an e-reader if they only read 30 minutes per day? In real life no e-reader will get anywhere close to 4 weeks battery life.
I usually get around 3 weeks on a charge with my Kindle Keyboard. I keep wifi/3G off and read about an hour a day.