It turns out that the Mugen battery group are CLUELESS IDIOTS. I was one of the FIRST to buy one of the large batteries from Mugen for my N900. I also bought several smaller batteries from Mugen for my N900. It turns out that I LOST my cover recently on one of my frequent trips from Los Angeles to San Diego. So now Mugen REFUSES TO SELL ME A REPLACEMENT. Mugen CANNOT LOOK ME UP IN ITS RECORDS because that requires effort. Mugen has lost a customer. Just in case anyone cares, which I doubt, my real name is Gene Venable