The U.S. Consumer Product Safety Commission is advising owners of Fitbit Ionic smartwatches to stop using the devices immediately.

The CPSC says the lithium-ion battery in the watches can overheat, posing a burn hazard.

Fitbit has received at least 115 reports in the United States of the battery in the watch overheating with 78 reports of burn injuries including two reports of third-degree burns and four reports of second-degree burns.

About 1 million watches have been sold by Best Buy, Kohl’s, Target, and other stores nationwide and online at Amazon.com and Fitbit.com from September 2017 through December 2021 for between $200 to $330. Fitbit stopped production of Ionic in 2020.

This recall only involves the Fitbit Ionic Smartwatch. It was sold with a polyurethane band and has a 1.4-inch color LCD screen.

The watches were sold in slate blue/burnt orange, charcoal/smoke gray, blue-gray/silver-gray, and a special edition co-branded with Adidas in ink blue/silver-gray.

The smartwatch tracks activity, heart rate, and sleep. 

Only the following models and colors are included in this recall. For the Ionic device, the model number (FB503) is on the back of the device near where the band attaches. Fitbit is printed on the front of the Ionic Smartwatch.

Consumers should contact Fitbit to receive pre-paid packaging to return the device. Upon receipt of the device, consumers will be issued a refund of $299. Fitbit will also provide participating consumers with a discount code for 40% off select Fitbit devices.

Contact Fitbit toll-free at 888-925-1764, available 24 hours a day, 7 days a week or online at help.fitbit.com/ionic or www.fitbit.com and click on “Product Help” at the bottom of the page for more information or fitbitionic.expertinquiry.com.