Toshiba is recalling Panasonic lithium-ion battery packs installed in 39 models of Toshiba Portege, Satellite, and Tecra laptops. The battery packs were also sold separately and also installed by Toshiba as part of a repair. Battery packs included in this recall have part numbers that begin with G71C (G71C*******). Part numbers are printed on the battery pack. A complete list of battery pack part numbers included in this recall can be found on the firm's website at http://go.toshiba.com/battery.

Toshiba has received four reports of the battery packs overheating and melting. No injuries have been reported.

If your laptop's battery is part of the recall, you should power off the laptop, remove the battery and follow the instructions to obtain a free replacement battery pack.

Devices with the affected batteries were sold at Office Depot, Staples and other electronics stores in the U.S. and online at Toshibadirect.com and other websites from June 2011 through January 2016.