Report Abuse. On my Panasonic camera when i first had it, I charged it until the little led turned off and then left it a further hour. The whole charge was about 3 hours or so. Sometimes it says in the instruction manual how long they recommend charging it for.n my Panasonic camera when i first had it, I charged it until the little led turned off and then left it a further hour. The whole charge was about 3 hours or so.