- Plugs right into USB ports
- Charges cell phone, digital camera, and lithium ion/polymer batteries for other devices
- Automatically assigns the correct polarity (so you can insert the battery any way you want)
Just had it delivered this morning, does what it says on the tin! It has adjustable prongs for the +ve and -ve terminals to fit virtually all phone batteries. Worked on my Nokia 6500 slide. Charged from my laptop in a few hours, LED goes red when charging. Maybe slightly large to fit on a keyring, but is only about the length of a key.
There is another version that charges from the mains, and also charges other USB devices, but requires buying a converter plug (will fit in UK mains but may need a tool to stick in the earth socket to open the other 2 sockets). Roughly £2.50 for both.http://www.dealextreme.com/details.dx/sku.11968