I had no idea that these batteries also could use a firmware update. I had just received my two batteries and one was giving me an error. The app wasn't reading any charge even though it was fully charged. It gave me a message a long the lines of firmware incompatible. Thank God all I had to do was swipe to resolve the issue. When I did slide the bar across it appeared to be doing nothing but after about ten seconds the battery showed up normal and fully charged in the app.