This Portable Battery Charger with large energy capacity in small size and light weight (approx net weight of bigger one is around 280g ) can supply the power for almost electronic digital devices, such as cell phone, digital camera, digital video, notebook PC, PDA, Removable hard disk, PSP, MP3, MP4... and because this products uses the Lithium-Polymer Cells, we can control the weight and size of this product under the ideal level, and there is a energy indicator lamp on the products, you will know the status of Energy capability before you out, and you can continually re-charge this battery charger if it is empty, and giving to the Diameter of DC input/output port of each products are difference, we prepare many DC plugs for customer select, the application area is greatly abroad, and can be correspond to almost mainstream brands digital products, which include the newest PSP or Nintendo DS or Game boy Micro etc. Here are data for your reference as below: Item ABS-102 can offer power for Mobile phone for around 30 days; Item ABS-102 can offer power for Digital Camera for around 20 hours Item ABS-102 can offer power for Digital Video for around 12 hours Item ABS-102 can offer power for laptop for around 2-4 hours