... , safety, power durability. * 4400mAh,5200mAh (optional) super power, the equivalent of 5-8 blocks of the smart phone batteries, durable ... 1 Large capacity, it takes around six hours to charge, according to the actual subject. 2 Once you found the ... Power bank exists conversion rate, so Power Bank capacity is not equivalent to full capacity. Portable Mobile Power Bank,4400mAh,5200mAh,power ...