Every iPhone owner needs an iPhone charger. You are going to have an easier time getting more out of your phone with one. This Skiva External Battery Pack is quite interesting. It charges your phone and has built-in Lightning to do the job. You can also use it to charge cameras, mp3 players, and other microUSB devices. You get overheat, overcharging and over-current protection built-in. Sets you back under $33 at this time.