Krypton KNPB5361 Power Bank remarkably compact - lightweight for its large 10000mah capacity. totally friendly with your pocket, purse, and palm comes standard with overcharge protection, undercharge protection, short-circuit protection and over-temperature protection to ensure complete safety for you and your devices. charge 2 devices together -twin usb ports allow you to juice up your 2 devices simultaneously. great to share with your family and friend. sleek & tough - a twill texture protective finish ensures that krypton power bank carefully grips your phone, with no chance of marking or abrasion. its ergonomic design makes it comfortable to hold in hand.