Yeah definately,

Well heres what im going to do,

set alarm,
Turn n900 off

Charge overnight via usb,
Battery status check it using terminal
Take battery out and hold power button on the device for 30 seconds (N900 seems to loose power after it fully charges strangely.)
Shake battery for the hell of it,
Power device back up
Battery status check again with terminal
Plug it in and see how close to 100% i can get,

Watch youtube and perform many tasks for a whole day and pray i make it througgh!!

As for you guys, keep posting here, tell us if you flashed or OTA updated or whatever, and ofc, post your battery life and performance!