Apple recalled its iPod nano in 2011 because first-generation batteries could overheat.
Apple announced a replacement program for first-generation iPod nano devices sold from September 2005 through December 2006. A battery manufacturing problem could cause the battery to overheat, creating a safety risk.
The program applied to the first-generation nano, recognizable by its small plastic body and click wheel. Apple asked owners to stop using affected devices and submit them for replacement rather than attempting battery repairs themselves.
The action is sometimes confused with recalls of later Apple products involving chargers or lithium-ion batteries. This program concerned the original iPod nano generation and its built-in battery.