... bigger than digital battery. 2. With remind function after fully charge. 3.CE,Fcc,RoHs Technical Parameter Batteries: Lithium-ion/polymerCapacity: 21600 ... can be used during on business, touring, long journey in bus, boat, ect. High safety, good compatibility, small size, ... . Range: 70W below laptop computer. high capicity portable mobile battery for laptop Power-Pond-12c , mobile etc other device