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Iphone 3gs USB connector.


Simon Paine

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OK, so I know I read somewhere that there is a difference, but I don't remember what it is.

I just put a USB plug into my soundcart and it can charge most things with a USB connection, except my Iphone.

What's different about the Iphone USB connection ?

Anyone know if it would be the same with the Iphone 4S ?

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You have to be careful when buying an iDevice USB cable now a days. It used to be that most cable manufacturers provided charge current on the FireWire power pins. A few years ago Apple announced to the industry that they were going to stop allowing that and have done so, but many older style cables are still out there that only provide connection on the FireWire pins for power. On top of that as soundslikejustin mentioned, Apple pulled out the ol USB spec and found themselves a tricky way to setup their devices to charge. Some say it was done to force people to buy their cables, other say it was better set themselves up for higher current chargers so that the devices could charge faster.

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