Just spotted this on Amazon: Amazon.com: Amzer 1600 mAh Lithium Ion Standrad Battery for Samsung Captivate i897 and Samsung Vibrant T959: Cell Phones… I'm honestly happy enough with the existing battery -- I have to try REALLY hard to kill it in a day -- but every extra mAh helps, right? Too bad this one is only 100mAh better than stock. Doesn't really seem worth $50 to me. But maybe, since this is listed as their "Standard" battery, they've got an extended one coming down the pipeline. I'd spend $50 for 2000mAh, easy.