A “small number” of iPhone 5 handsets apparently have a battery problem, causing their battery life to become depleted really quickly or for them to expire altogether. Apple initiated a free battery replacement program, in which customers could bring their phones to an Apple Store and have them replaced for free. This was only valid for two years following purchase of the device, and was due to run out in January of this year.
However, the company has decided to extend the program, offering free replacement batteries until January 2016. This could mean two things – the problem is so severe that they need to ensure everyone can take advantage of it, or it could mean that very few people have actually claimed a replacement battery.
To get yours, you need to visit this website and enter your serial number. Only certain devices with certain numbers can get the replacement, but it appears that for many, Apple is playing on the safe side, and you could find yourself getting a new battery even if your battery is just not holding as much charge as it used to (as with any old phone).
If you’ve got one of the affected phones, make a visit to the Genius Bar at your local Apple Store. They should replace the battery while you wait.