... 4.Operate easily 752990 2200mAh 3.7v polymer li-ion battery cellSpecifications: Typical capacity: 2200mAh Nominal voltage: 3.7VEnd voltage: ... earphone.Portable devices: MP3/MP4,GPS, PDA, E-book, PMP, Sony's PSP, portable medical device Features: High operating voltage, large ... be adjusted while width and height keep the sameLithium polymer battery is a better and safer replacement for lithium ion ...