Everything has to be seen in perspective.
When I'm on a trip I also carry a phone and an MP3 player. Both of them effectively have a worse battery life than the Cybook. The MP3 player last for only 16 hours, the phone lasts about a 100 hours. The same as the Cybook but I keep it on all the time. I switch off the Cybook when I'm sleeping. So the phone lasts only four days but I have to charge it every two, because if I wait for 3.5 days, I can only use for a couple of minutes.
For me this means that with normal use I have to charge the phone at least every two days, the MP 3 player every 3-4 days and my Cybook once a week
The Cybook is easy to charge. I have a universal charger with several plugs. So I need only one charger. Simply connect one device per day and all of of them stay charged to the max. It even works for about one charge without a wall outlet
http://www.consumer.philips.com/cons...05_GB_CONSUMER