This power bank is equipped with a built-in USB cable, which enables you to charge your devices without bringing an extra cable with you especially when you are out for a trip. Cable-free, trouble-free.
There are four LED indicators while no on/off button. Just use your finger to tap the indicator like knocking the door, it will show you how much power is has. The color of the built-in cable differs from the main body of the power bank, making the whole device colorful and attractive.
The PB4000CB adopts high-quality Lithium-ion polymer batteries to ensure a high conversion rate as well as short-circuit and over-current protection. The power bank will automatically shut down when such situations occurred.