I deleted juicedefender. I did install the one that prevents apps from starting. I haven't seen much of a difference.. and I can't really give any accurate numbers because I have gotten into the habit of charging in the car. I think I am going to order another stock battery or maybe the Seido one just in case. I do know that it has been so greatly improve that I can't complain. I just can't wait to root so that I can get all the bloatware off and speed it up even more!