Owners of the affected devices are advised to stop using them and submit a claim for a free replacement.
Affected devices were sold between September 2005 and December 2006.
The issue, which is blamed on a specific batch of faulty batteries, could cause the battery to overheat.
You can submit an online claim for using your iPod's serial number on Apple's Support website.
Joe is Content Director for Specialist Tech at Future and was previously the Global Editor-in-Chief of What Hi-Fi?. He has worked on What Hi-Fi? across print and online for more than 15 years, writing news, reviews and features. He has covered product launch events across the world, from Apple to Technics, Sony and Samsung, reported from CES, the Bristol Show and Munich High End for many years, and provided comment for sites such as the BBC and the Guardian. In his spare time he enjoys mixing vinyl and cycling.