After doing some research, most will tell you Juice Defender, and the like battery savers, will only consume RAM and take more "juice" than they are worth. I don't have any of those "juice saving" apps and am getting an average of 20 hrs. between charges on my RAZR. You just need to utilize the Smart Actions and Task manager...additionally, evaluate what widgets you really need to have running and how often they update. After owning the RAZR, from shortly after it's release, I am a firm believer that you can tweak your phone, using stock applications to get a decent battery life. "Decent" considering you have a newer Android based phone...since most Android phones (dual-core, etc. etc.) use more battery by nature. I do have an external battery (New Trent 5000 mAh) that I use and find somewhat convenient (not having to be "tethered" to a wall outlet).