well i first put the battery in my droid4 it did run but there was a ? over the battery symbol, so i had to download a app just to know how much charge i had it said 65%
the package says charge 10 hours. i tried charging it with the phone on for over a hour, the percentage didnt move
i turned it off and tried charging it and againt he battery meter had a ? on it but i left it off to charge for a few hours
turned it back on to see if it made any difference and it was still stuck at 65%
so i tried using it. after about 5 minutes of web browsing the phone just shut completely down and was completely dead. wouldnt turn back on or do anything at all.
had to put the old factory battery back in
the only good thing was shipping came kinda fast in i think 3 days, 3 days for something that didnt even work lol