Keep your cell phone and tablet computer powered up anywhere and at anytime. CellPhoneCases.com sells bargain-priced universal backup battery chargers that are designed to work with an extensive range of devices. They are available in various sizes as well as battery capacities, providing a variety of choices to balance between portability and power level. Rechargeable via an AC power outlet, car cigarette lighter socket, computer’s USB port, by sunlight or indoor light. These portable powering gadgets are extremely convenient and easy-to-use. Keep one handy all the time in order to ensure battery power to phone or tablet!