I ordered this $20 battery instead of the less-expensive $10.00 alternative because I wanted a battery that performed like the original. I was initially happy when it showed up, because marked right there on the box it said it was a 750 mAh (milliamp-hour) battery. When I went to install it, however, I noticed the battery itself is marked as having a 600 mAh capacity.I thought maybe the battery was mis-packaged. So I contacted Amazon's customer service via the link on their webpage. That was a month ago, still no reply.So did I get ripped off? Did they send me the $10 battery in the $20 package? Was it mislabeled? Who knows. Just don't depend on Amazon's customer service to look into an issue like this. They've got their money, and apparently that's all that matters.