Battery Bank will never leave you without power! This portable battery can easily be charged by any PC or Mac that has a USB connection. After you have fully charged the Battery Bank, keep it in a car, office or even your wallet or purse. This will allow you to recharge your mobile phone or electronic device anywhere. Battery Banks can be charged using the USB port of your computer. Select an adapter for portable electronics such as: Mini-USB devices Micro-USB device Nokia 2.0 Samsung D800 Sony Ericsson k750 Any cell phone compatible with these ports, like Blackberry You can charge your devices quickly and easily anywhere with the Battery Bank.