TAG Heuer's Solar Watch Can Run for 10 Months Without Charging

TAG Heuer has launched the Formula 1 Solargraph, a solar-powered watch that runs for up to 10 months on a full charge and keeps time even in dim light. The new Calibre TH50-00 movement uses solar cells paired with quartz timekeeping. Analysis: This far outlasts typical smartwatches, which need daily or weekly charging. The breakthrough suggests real gains in solar cell efficiency and power management—improvements that could shift what consumers expect from wearable battery life more broadly.