The new iOS 9 has a feature called “low power mode” that claims to save battery life. The phone prompts you to enter this mode when your battery falls below 20%.
Low Power Mode seems to turn off notifications, and background activity, and reduces other battery-wasting features to on-demand only.
This is great for saving that last bit of battery on your dying phone, but I thought it would be useful to use it full time on a phone as well. So I tested it an older iPhone 5.
The phone doesn’t get a lot of use, and usually sits around on a kitchen counter. A perfect candidate for Low Power mode.
The phone has 455 battery cycles on it. It was my main phone for a while, then it was handed down to my wife before becoming the backup phone. Still, Coconut Battery reports it still holds about 89% of its original battery charge.