Originally Posted by Jellby
I meant the time it takes the battery to discharge, not the time it takes the battery to be dead and useless and not accepting charge anymore. The latter is indeed several years, I've had my Cybook for more than two years, and the battery is still healthy.
Yes, but it will loose capacity even if you do not use it. So the important factor is if keeping it always on really will decrease the capacity significantly faster. I doubt it.