The BOLT² combines a backup battery and wall charger into one to give you the ultimate freedom with your devices. With two USB ports and a 6600mAh rechargeable battery, BOLT² can power two devices at the same time. BOLT² is designed to replace your standard wall charger for your phone or tablet so it’s always ready to go when you are. Best of all, it automatically charges its battery while your devices are isplugged in so you never have to worry about charging BOLT² separately like other power banks. This makes BOLT² a true grab and go solution.