Beforeyou purchase an power bank you would put an eye on how many times power bank totally charge your device, for example, if it's a 10000 mAh rated power bank, you would possibly expect to charge your 2000 mAh phone for 5 times, really it's a totally wrong calculation technique.
Itsrated input is 5V/2A, so if you use a 5V/1A power adapter to charge it, its actual input current is 1A=1,000mAh. 10,000mAh /1,000mAh=10 hours. If you use a 5V/2A power adapter, it takes 5 hours to fully charge the power bank: 10,000mAh / 2A (2,000mAh) = 5 hours. Same for charging the phone.
Howmany times can the power bank charge a phone? Applicable products： The number of times that the power bank can be used for charging depends on its remaining power supply, the battery capacity of the charged device, the quality of the charging cable, and the charging environment.
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how many times can a 10000mah power bank charge
