It can be useful but it's no panacea. As always with battery life threads, for the greatest improvement analyze your specific usage and make adjustments to deal with your major battery hogs. It does no good to tweak power usage settings if they have nothing to do specifically with your usage or impact something that uses a tiny percent of battery in your case.I would like to get some input on this app. Does it actually help or does it use up to much battery itself to actually help the battery?