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Power bank questions

Hi, I recently got a new power bank(UE10044PQ) but I noticed It only has only 2A output. Can it be adjusted? I use an iPhone 7 and don't feel good about charging at 2A (it comes with 5W charger and gets hot while it's charging. I assume it will get even hotter at 2A. also I care more battery health than charging time.). on the back of the device it says 5V 2A , 9V 2A and 12V 1.5A but on manual all ports are 5V. If that's about charging multiple devices shouldn't be 10V(supports two devices) ? 

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The phone itself draws a certain current (measured in amps). 2A is just the maximum the charger (or power bank) will supply.

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31 minutes ago, akio123008 said:

The phone itself draws a certain current (measured in amps). 2A is just the maximum the charger (or power bank) will supply.

oh so It's fine. Thanks.

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