... Voltage:3.7V Nominal Capacity:300mAh Application:mp3,mp4,bluetooth,etc. Mp3 batterySpecifications:Model:HW502035Nominal Voltage:3.7VNominal ... notebook, earphone, bluetooth devices, MP3, MP4,R/C toys, power-driven tools & toy, camcorder, digital camera, head set stereo, ... handy terminal, mini disc player, etc. High quality MP3 battery