Originally Posted by Cory Scheuer
Thats all i'm going to say... you buy cheap yours going to get cheap... stick with a good company that makes good batteries... either get another OEM battery from RIM or get the seidio ones... battery power is something you dont want to mess with...
Agreed, and here's why: Lithium-ion batteries have a relatively unstable chemistry and must be manufactured correctly with various types of protection. One way these batteries fail is to release a lot of energy in very short order (i.e. explode).
Example: My Curve's OEM battery: 3.7V * 1Ah * 3,600s/h = 13,320 joules of energy. It's no stick of dynamite, but ten bucks says that amount of energy released in less than a second could blow your hand off.
Point is: Lithium-ion batteries are pretty dangerous things. Only buy from trusted sources (not eBay).