Just a heads up, I purchased one of those 1500mah from eBay and it worked fine for awhile... then all of the sudden my battery life went down to two hours or so and my proximity sensor stopped working and my locations were also totally hosed. I brought it into VZW and they were clueless and just performed a wipe to cure the problems... NOT. Because the battery life was so bad, I brought my old 1300 along one day to keep me going. After I put the 1300 in, all the issues disappeared. It is weird, because the 1500 is from HTC and it never really gave any extra life, but sure made a mess of my Eris. Three days now of running the stock battery and no issues.