The RAVPower battery capacity is 10000 mAh and it guarantees fast charging Its electrical power is 20 watts The small size of the RAVPower portable battery is: 4.4 x 2.0 x 1.0 inches It is pocket-sized with great charging speeds This power bank has an LED light that alerts you when charging is complete RAVPower mobile battery has a scratch-resistant casing for complete protection against damage