A commercial nuclear battery from City Labs. A Betavoltaic cell is a device that uses a radioactive ... and it is also used in watches and firearm night sights. The beta particles (electrons ...

To me, a watch is a tool that serves a purpose — primarily, to tell time when I’m working or can’t easily access my cell phone ... Every couple of years, the battery dies and needs replacing.

Battery life on the OnePlus Watch 3 puts a lot of smartwatches to shame. Find out how it compares to that of the Apple Watch ...

The OnePlus Watch 3 is finally official with ... BES2800 chips in charge of each OS. Regarding the battery, the firm integrated a 631 mAh cell—26% larger than the previous generation.