Sometimes when a device fails, it fails in spectacular fashion. Daniel Rotar, who leads the ZONEofTECH YouTube channel, posted on X today that the battery on his Samsung Galaxy Ring began swelling while he was wearing it. “I cannot take it off and this thing hurts,” he wrote. A few hours later, Rotar posted again that he had gone to a hospital and received help to remove the smart ring. He also shared photos of the device that showed the swelling on the interior surface. We reached o...

A recent report online shows images of an immovable Galaxy Ring with a swollen battery, showcasing a nightmare scenario for a smart ring and causing both a missed flight and a hospital visit. Batteries can expand when overcharged or as they age; that’s just the nature of lithium-ion cells. Swollen batteries, though, can be a serious problem. Samsung has… uh… had some experience with this issue in the past. On Twitter/X, @ZONEofTECH posted a set of anxiety-inducing images. According to the...

Nina Raemont/ZDNET ZDNET’s key takeaways Oura Ring 4 users report shorter battery life. The claims come a year after its debut.  Oura seems to be quickly responding to this issue.  When Oura unveiled its fourth-generation smart ring last October, its eight-day battery life was a major draw for those upgrading from the Oura Ring 3. But a year after its release, it seems like that eight-day battery claim is weakening.  Reddit users on the r/ouraring forum report that their smart rings are...

Despite America’s recently suppressed appetite for electric vehicles, battery technology continues to advance. A promising development out of a Massachusetts Institute of Technology (MIT) lab discovery has recently come to light. A Cambridge-based company called 24M Technologies claims its “SemiSolid” battery architecture—designed to work with different existing technologies—can boost an EV’s range and charging time or shrink battery size and cost. Its new system is dubbed ETOP (...

XCMG to deliver up to 200 240T battery-electric haul trucks to Fortescue The collaboration will accelerate green mining at Fortescue’s iron ore operations By Stephanie Bontorin September 29, 2025 XCMG Machinery singed a new agreement with Fortescue to strategically cooporate on green mining equipment solutions. Under the agreement, XCMG will deliver 150 to 200 units of 240T battery-electric haul trucks to Fortescue, marking China’s largest-ever export order for green mining machinery. Ya...

(Image credit: Avenir Telecom) EnergyBook Pro Ultra packs a 192Wh battery, the largest ever fitted into a laptop Avenir Telecom claims up to 28 hours of use and a week on standby At 192Wh, the laptop unfortunately exceeds aviation limits for carry-on batteries Energizer, better known for batteries and smartphones, is launching a new laptop that puts endurance ahead of all else. The EnergyBook Pro Ultra comes with a 192Wh lithium-polymer monobloc, which the company says is the largest battery eve...

Finding out which electric vehicle (EV) battery charges the fastest in 2025 depends on whom you ask, what their methodology is, and which specific vehicles they have tested. All of these variables can produce differing results. Other factors, including the battery’s state of charge, its temperature, the outside temperature, the EV’s maximum charging rate, and the charging station’s output limits, will also be responsible for variations in your charging time. The fastest chargin...