With a 10000 mAh capacity, the RAVPower battery ensures quick charging. It has 20 watts of electrical power. The RAVPower portable battery measures just 4.4 x 2.0 x 1.0 inches. It has excellent charging speeds and is pocket-sized. An LED light on this power bank lets you know when the charging process is finished. For total protection against damage, the RAVPower mobile battery features a scratch-resistant casing.