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.

I bought two of these, both fell apart (literally) within several weeks of infrequent use. Even when they worked, they never worked reliably and required connstant twisting and turning and pushing to get a connection. The whole thing looked like they were put together by a child (no, I’m just talking figuratively and not implying what you think I’m implying about Chinese labor, which is a whole different issue). A gentle squeeze, the thing goes squeaky and shaky. Unlike most other car adapters, this one doesn’t have a snugly fit into the cigarette lighter. It is just so wobbly everywhere. Avoid such low quality products to keep your life sane.

An update: I subsequently purchased a few Universal Mini USB Car Charger Adapters offered by Eforcity (search Amazon or eBay). What a difference. The Universal Mini USB Car Charger Adapters is exactly what this product should be made alike. Solid, compact, and reliable. Both are inexpensive Chinese made products, but one is total junk and other a gem.

Source: Daily Break News