portable power supply "=battery and charger 2 in 1,it is an universal power supply .it is a kind of power which accompany you anywhere,everywhere. It not only can charge your cell but also can supply the power to your portable digital products i.e. Mobile Phone, Notebook, Pocket PC, DC, DV,MP3, MP4, PMP, PSP etc., you no longer need to worry about "no power" wherever you are, whatever you are doing. Advantages: 1. Fully compatible: Compatible for more than 95% digital products in the market. 2.Large capacity: Providing 4-30 times of power for different digital products. 3. Smart: Show the capacity only need by touch one key. 4.High safety. 5.Fashion and portable.