A faulty Samsung Galaxy Ring battery caused the smart ring to swell up, sending its wearer to the emergency room for removal.

Button cell battery ingestion causes thousands of injuries and along with a number of deaths each year in the US. Here's the only brand you should buy now - and why.

Take smart rings. They're bands of metal or plastic containing a tiny rechargeable battery. Most of these items go through their lives doing what they're supposed to do, until the battery is exhausted ...