... 7V Nominal Capacity:300mAh Application:mp3,mp4,bluetooth,etc. Mp3 battery Specifications:Model:HW502035Nominal Voltage:3.7VNominal Capacity:300mAh Major Features ... PCB design: Due to adopt the polymer materials, the battery has enough safety and don't explode,the PTC and ... devices, MP3, MP4,R/C toys, power-driven tools & toy, camcorder, digital camera, head set stereo, handy terminal, mini disc player ...