Originally Posted by frantik
Thanks.. I guess I will just assume all batteries don't have the protection circuit. If i hadn't found this thread I probably would have blown up my house
I just read your question, and looked like it's been sufficiently addressed.
The NanoTechs are good and inexpensive batteries. The problem is that they are constantly out of stock. The eBay sellers scoop these up by the masses and turn a good profit from them. But when you get them from the source, they are cheap.
The first two posts of this thread discuss about the battery and alternate solutions. If you don't have a good charger, you should consider getting one. It is much better than using the USB cable in the long run.