Mobile Power Bank 20000mah, Battery Power Bank 1)15000mAh,18000mAh,20000mAh 2)Power durability 3)Built-in short circuit Mobile Power Bank 20000mah, Battery Power Bank,Portable Battery Power Bank Features: * Portable Power bank uses the international leading high-capacity lithium-ion battery, with environmental, safety, power durability. * 15000mAh,18000mAh,20000mAh (optional) super power, the ...