Here Trog100 is not right I think. The USB 2.0 specification clearly states, that USB ports complying with it shall have overcurrent protection and shall withstand short-circuit for unlimited time. It is allowed for the port to shutdown its output power under overload conditions, or even to require a reset to resume normal operation - these are up to design - , but no damage to the port is allowed by the specification.feeding five volts straight from the USB socket to the e cig atomizer will wreck the PC..
Consequence - in my opinion - is that if anyone's USB port is fried by an e-cig, or a short-circuit, then that port did not fully comply with the USB 2.0 specification, and so the manufacturer is liable for the damage..
This might not apply to USB ports complying with the old USB 1 specification, what I do not know at all. Anyway, the USB 1.0 port in my old desktop was not fried by the USB mod either, it only seemed to provide much lower current (current limiter inside).
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