PowerGen 14000mAh 3.1Amps Dual USB External Power Bank Charger for Apple iPhone 5, 4s, 4, 3Gs, 3G, iPod Touch, iPad 1, 2, 3, 4 and Smartphones Ultra High Capacity, 14000mAh, extend 80 hours of talk time or 40 hours of video play back time for iPhone 4. Compact, portable and stylish Design. Convenient to carry in your pocket or purse. Leave it plugged in to your phone. Grade A Lithium-ion cells used ensures reliability; 500 + recharge cycles over the life of the battery Rechargeable: Convenient rechargeable battery allowing you to always have a battery charging backup when you are away from a AC outlet NO AC adapter is included. The PowerGen Battery Pack is compatible with all USB chargers come with your Cell phone or tablets.