Aukey has their 20,000mAh battery pack on sale right now for about $35. It's normally closer to $70, so it's a pretty decent price. It features two USB ports as well as a flashlight. It also features 4 blue LED lights to keep you in the know as to how much battery life is left on this Aukey battery pack. Although I'd prefer and LED display. You can pick up the Aukey 20,000mAh Portable Charger External Battery Pack from the link down below.