Comment on Ask HN: iPad says USB accessory detected when plugging into powerparentComments−warrenm4yBecause it's not merely a "charging outlet" ... there's electronics in the charger to convert AC to USB power out :)−hereforphoneOP4yAs I understand it these typically just use the power rails of the USB interface. I've used several AC->USB converters in the past, and they haven't been detected as a device. This is unusual at least in my experience.−warrenm4yI've yet to see a charger I've bought anywhere not give the warning the first time I plug into itHappens pretty frequently with cables, too
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Because it's not merely a "charging outlet" ... there's electronics in the charger to convert AC to USB power out :)
As I understand it these typically just use the power rails of the USB interface. I've used several AC->USB converters in the past, and they haven't been detected as a device. This is unusual at least in my experience.
I've yet to see a charger I've bought anywhere not give the warning the first time I plug into it
Happens pretty frequently with cables, too