Two problems keep me from rating this very inexpensive car USB charger higher:1. The charger that I received doesn't appear to be the same charger pictured on the product description. (eg., completely different molded body, glass tube fuse instead of plastic-encased fuse.)2. It won't charge my iPhone properly. After some testing with a multimeter, it seems the output is close to 6 VDC, despite being labeled as 5 VDC +/- 5%, which would be a max. voltage of 5.25 VDC.Overall, it's not worthless. Other less sensitive USB-powered products may be able to be charged by this.