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sorry but that is not true. Some devices throttle down the charging requirements for CPU use on a USB port. As I said they sense that they are plugged into a computer. They typically list a longer charge time when hooked to a USB port than when hooked to a charger.
When these same devices are hooked directly to a AC charger they pull more current to charge faster. However this depends on the AC charger being able to supply more current. Devices are smarter now than they used to be but they can outsmart themselves if you use a charger with lower capacity than they are expecting.
Dale
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