Bolt 2 combines a backup battery and wall charger to give you the ultimate freedom with your devices. With two USB ports and a 6600mAh battery BOLT2 will charge two devices at the same time. This means you will be ready for your next adventure. BOLT2 is designed to replace your standard wall charger and will automatically charge with your phone or tablet and be ready to go when you are. This makes BOLT2 a true grab and go solution.