Many of us with backup batteries that were not Motorola brand have found that after the OTA 2.2 update they will no longer work. Motorola or Google has made a software change so that they will not work. I have two batteries I got off Ebay that I kept in a rotation and quite frankly could not tell any difference in performance. I am not a programmer, developer. or hacker but it seems that with all the developer talent out there it would be possible to fix this issue. I know I would be willing to pay / donate for fix. Just a thought!