Both USB ports have the ability to output 2.1A. The maximum output collectively between the two ports is also 2.1A.For example, if both USB ports are being used at the same time to charge two iPhone 6s, the 2.1A will be split between them and each device will receive around 1A.If you want to charge one device at 2.1A, it does not matter which port you use, as both can supply up to 2.1A.
Answered by: EnerPlex
Date published: 2015-05-28