K700i swithced off even half battery
 

hi,
my mobile K700i gets switched off while receiving a call even i changed the battery also. It happens only on half of the battery charge. When i am putting charge within 2 minutes it shows full charge.pls help me.

you should change a new battery,and attend to your phone when you putting charge,make a call from other phone,if it switch off,check power amplifier