If you have an iPhone 5, you may have noticed the battery isn't lasting as long as you'd like it to.
Apple says a very small percentage of iPhone 5 smartphones may suddenly have a shorter battery life.
The affected phones were sold between September 2012 and January 2013, and only have certain serial numbers.
The company is offering a free replacement.
To find out if your phone is eligible, visit their website here.
for more features.