Polymer battery charging Voltage:4.2V add or reduce 0.05V
Product net weight:50g(including battery)
Product specification:5.2cm*3.2cm
Battery Charge time:DC 5V 200MA to 300MA around 2.5 hours; USB 4 hours;
Battery Discharge time:MP3 volume in 31mv,about 2 hours;MP3 volume in 20mv,around 8 hours;(in the baise of volume level.music rhythm ect long or short of time)