supply li-ion and polymer li-ion rechargeable battery CR2 THE model is CR2 the capacity is 750ma the volts is 3.7v MAJOR APPLICATION Telecommunications Cellular phones, PHS, Bluetooth earphones. Audio and Video Devices Digital cameras, Camcorders, Portable DVD, MD, CD players Information Devices Notebook computers, Personal facsimile machines, PDAs. Electric Bicycles Miner Lamps MAJOR FEATURES High Energy Density High Voltage Pollution-Free Long Cycle Life No Memory Effect Minimal Self-Discharge High Rate Charge/Discharge if you want to know more information about the model you can come to this website to have a check /Product/product_images/t/cn_t__542.pdf if you have any other enquiry,pls feel free to let me know and you are welocme at any time looking forward to your reply best regards Kelly