We all know the best thing iPhone can do is multitasking and it is very powerful, but it also cause the phone to run slow if you open too many application at the same time, so the first little thing you can to make your phone run faster is to Shut down unnecessary applications. We can start with the easiest way, but you should remember to close down all non-essential apps all the time. Because when you run multiple apps at the same time, it might slow your iPhone or refurbished iPhone 5 down and shrink your battery’s life.

You should manage the battery better. There are a number of good ways to manage your battery life on an iPhone. One good trick is to manually send your phone into "Low Power Mode," which disables some features such as automatic downloads and mail fetch to keep your iPhone or iPhone 5 refurbished running on low power. If you're going to be at a concert, sports game or other event that can be hard on your battery, it's a nice feature to have. Just head to the "Battery" menu to turns that on you. It's hard to say exactly how much more battery life you'll get out of this mode.