Yesterday I bought Nokia 5220. The vendor asked me to charge it for 8 hours. But within 2 and a half hours itself the cell displayed "the battery is fully charged. please remove the charger to save current" or something like that. I duly obliged. Now after 24 hours the phone's battery was fully drained and it switched off. I have placed it on charge now. But for some reason when I try to switch it on its switching on! Is that supposed to happen or is the cell screwed already?!