Oura users report smoking, overheating Rings - what we know

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ZDNET's key takeaways

• Two Oura users reported their rings smoking and overheating. 
• Smart rings are built with lithium-ion batteries.
• They may overheat if damaged or improperly charged.

Smart rings have had some bad press recently. Earlier this year, a Samsung Galaxy Ring began swelling on a user's finger as he was about to board a flight. And last week, two Oura Ring users reported their rings were overheating and smoking. 

A user on the Oura Ring Reddit reported that their ring began smoking and burning their finger on a morning walk. The user felt a burn on their finger, attempted to get the ring off quickly, and developed a blister upon removal. 

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"My hand smells like electronic fire," the user ...