Features: Built-in polymer li-ion battery, our charge can store energy when you are not using it. Able to charge in around 13 hours or faster. You can also charge it by USB cable. Compatible with more digital devices. Fully compatible with Android, IOS and digital camera. A variety of large capacity for endurance, With 1800, 2600, 5200 MAH choice, safe and reliable, not afraid of power off anytime and anywhere. Meet the civil aviation mobile power carrying standard, can get on the plane. go with you without worry. Solar energy, outdoor travel series. Small volume but large capacity.