So you’ve probably seen an online ad for a gimmick charger sold by a “former Apple engineer who was fired for revealing so-and-so” that boasts it can improve your battery life by adjusting your iPhone’s software. Well, watch as these guys (one of whom worked in an Apple store) tell you 14 ways iPhone users can dramatically increase battery life. They won’t make you buy anything to learn how editing your settings, shutting off your phone about once per week, and potentially doing a one-time DFU restore, can get your battery that you thought needed replacing… to last much longer.