... Voltage:3.7V Nominal Capacity:300mAh Application:mp3,mp4,bluetooth,etc. Mp3 battery Specifications:Model:HW502035Nominal Voltage:3.7VNominal ... steel shell and aluminium shell liquid lithium cell.4.Low internal resistance:5.Excellent discharge performance.6.Simple PCB ... Portable DVD, PDA , Cellular phone, notebook, earphone, bluetooth devices, MP3, MP4,R/C toys, power-driven tools & toy, camcorder, ...