Tribe Simpsons Logo USB Portable Universal Power Bank External Battery Charger for Smartphone Official Licensing The Simpsons Powerbank 2600 mAh. Award winning design makes the right impression with its distinct licensing design. Makes it a great gift idea. The highest quality rechargeable battery and a powerful speaker stand to boost your mobile music device. Works with most mobile phones via their original USB charging cable. No fiddly wires - easily recharge with in-built cable. Small but Powerful Enough: Ultra sleek and slim, with a compact Mini size fits easily into any pocket or bag. Travel safe for flights, car rides and other adventures.