I DO NOT RECOMMEND YOU ATTEMPT THIS YOURSELF, NOR AM I RESPONSIBLE IF YOU DO!
I had an interesting experience with the Anker Powerdrive today. A person I know has a lightning cable (by Apple) that has been shorted. The positive touching the negative on this cable. No joke. Seriously. Knowing it was a faulty cable, I let them plug it in. I expected a fuse to blow or something to get fried.
I was using this car charger:
When plugged in and the leads were touched, instead of something catastrophic, the Anker car charger simply cut all output. The light on the unit when off when the leads were touching, and turned back on when it wasn't being shorted out. After abusing the car charger by repeating this process about 6-8 times, I decided it had had enough abuse. I unplugged both the lightning cable as well as the car charger. When the faulty lighting cable was plugged in, the Anker turned off. When it was unplugged, the Anker worked as expected.
Being daring, I decided to plug my iPhone 7 into the car charger with a non-damaged cable after blatantly and relentlessly shorting out the Anker car charger. It charged just like normal. The Anker knew the difference between the shorted cable and the non-damaged cable dispite the fact that the short was localized.
I have no clue what technology is implemented in this charger to not die when shorted out many times for an extended period of time, but it's pretty neat.