Mp3 battery Model:HW502035 Nominal Voltage:3.7V Nominal Capacity:300mAh Application:mp3,mp4,bluetooth,etc. Mp3 batterySpecifications:Model:HW502035Nominal ... : Due to adopt the polymer materials, the battery has enough safety and don't explode,the ... PDA , Cellular phone, notebook, earphone, bluetooth devices, MP3, MP4,R/C toys, power-driven tools & toy, ... mini disc player, etc. High quality MP3 battery