kuulaa 20000mah power bank pd fast charging poverbank quick charge external battery charger for iphone samsung xiaomi powerbank

attention please recently, some customer feedback showed the digital display is abnormal and the capacity is not accurate. we are quiet sure to say the capacity of this portable power supply is 20,000mah. it is a new high-tech product combining fast charging technology and digital display. please try the following solution to solve the problem: step1 release all remaining power of power bank. (until the digital display charging current is 0a). step2 charge the power bank for 12 hours ...