I want to order some more fast charging USB cables, but how do I identify the difference? What IS the actual difference between the cables?
It is a bit complicted.
By the micro USB standard, if you tie the two USB data lines (D- and D+) together, then the Thunderbolt goes into a fast charge mode. I have seen around 850ma max. You can place a piece of aluminum foil on the charger end (large USB) to short out the two center pins only and switch it to high rate.
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