Rechargeable  battery, generally has been used for mobile phone, digital cameras, video  cam, PDA, laptop, various electronic equipment. 
Built in protection PCB to protect the battery from over charged or under  discharged.
Features:
- No "memory" effect 
- Short circuit and over current protection 
- Long cycle life and environment friendly 
- The voltage of fully charge & discharge condition is 4.2v & 2.75v  respectively