What's The Best Replacement Battery To Buy?

I was wondering if any of you guys know what the best replament battery for a gbm is? I tried the Lenmar one but it arrived with a broken red cable and the battery port didn't fit into the socket at all. I actually ended up bending one of the prongs in the socket (lucky for me I fixed it), I even tried phoning nintendo to see if they still had any in storage or something somewhere which turned up a dead end. Please help, I'm desperate for some answers because I just want to play my new toy. Thanks in advance!