My friend Soren recently gave me a Super Power Bank, a nifty portable Lithium battery pack with two USB ports for charging devices on the go. The Super Power Bank has a 6600 mAh battery with two USB ports for charging devices; one providing 1.0 A, the other 2.1 A. He asked me a question: do my devices charge faster on the 2.1 A port? Down the rabbit hole I flew.
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