UNU Enerpak Maximum 17000mAh Battery - Retail Packaging - Black The most powerful and compact battery pack created by uNu so far. The monster size battery capacity. Compact, portable and stylish Recharge time: 15-16h via 1A input, 12-13hours via 2.1A input (No AC charger is included, but product works with any USB wall charger. Note that significantly longer recharging time is expected if adapter output less than 1A) Its huge capacity of 17000mAh charges the iPhone almost 8 times Built-in bright flashlight helps any emergency situation.