Apple Replacing Affected iPhone 5 Batteries
Apple has started a battery replacement program for iPhone 5 devices sold between September of 2012 and January of 2013. The affected units “may suddenly experience shorter battery life or need to be charged more frequently”.
Image via iFixIt
Apple’s support site has a tool to see if your serial number is part of the affected units, as well as details on how the replacement will work. After verifying your unit is eligible for replacement, you can bring in your undamaged phone into the nearest authorized service center, retail store, or contact their technical support. If you’ve already paid Apple to replace the battery on your iPhone 5, you may also be able to receive a refund.