A recent report by the Consumer Affairs Agency (CAA) warns consumers about the dangers associated with heated apparel, such as vests and jackets with built-in heating elements, as well as rechargeable hand warmers powered by lithium-ion batteries.

The report, part of an international safety initiative led by the Organisation for Economic Co-operation and Development (OECD), urges consumers to exercise caution when using these devices.

According to the CAA, injury reports linked to lithium-ion battery-powered heating gear have surged over the last 10 years, with 68 incidents recorded between April 2014 and September 2024.

While annual cases ranged between one and five from fiscal 2014 to 2019, incidents started to spike in fiscal 2020, peaking at 19 in fiscal 2021.

Heated apparel accounted for more than half of the reported cases, with 35 incidents, followed by heated gloves at 15 cases and electric blankets at seven.

Regarding the cause of the accidents, 32 incidents are believed to be linked to the lithium-ion batteries in use. Among these, 18 cases involved smoke as well as devices catching fire or overheating.

The majority of battery-related incidents occurred while the devices were in use, accounting for 13 cases, while 11 cases occurred during charging.

The report detailed several severe accidents involving the devices, including a heated vest battery overheating and melting during use. In another incident, heated insoles purchased online began emitting smoke and became dangerously hot despite being switched off, melting the user’s shoes and socks and causing burns that required emergency hospital treatment.

Lithium-ion batteries are particularly sensitive to impact, pressure and heat, the agency notes. Consumers are advised to handle them with care, avoid dropping the batteries or exposing them to heaters or covering them with blankets, as these conditions could lead to fire.

To reduce risks, the agency recommends charging lithium-ion devices in supervised, visible areas away from flammable materials.

The agency also urged consumers to purchase products from reputable manufacturers to ensure quality and safety standards are met.