Be careful buying some things out of the far east on Ebay. I ordered 4 batteries for my 4500 at very good prices. I asked that they be shipped in one package, hoping to save on shipping. The company sent them in one package alright but charged me four shipping fees. Still a good deal but it eroded my savings plus really p****d me off. Then there was their Feedback policy!
Moral: read the fine print!