Yesterday I installed the Rockbox daily build on my 4G 40GB iPod. This went fine, it works like a charm. But today, when switching the thing on, only the Apple logo appeared with a thin horizontal line, then there was the Rockbox boot screen and after that, the iPod went off immediately.
I later discovered the battery was dead... Now it's charging.
Does a modded iPod with Rockbox eat the battery capacity when switched off?