Fly Mobile Handset MC160
Battery not showing fully charged

I bought Fly handset MC160 on 26.08.2010 from Reliance Digital, Vashi, Navi Mumbai. But from the first day I charged the battery for 12 hours but still it is not showing "Battery Full" and twinkling is going on. I showed it to Fly Service Point at Koperkhairne, Navi Mumbai and they kept it for three days. During returning time they tpld that software updation is done and now it is ok. But still this problem is going on.