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You can also use a "dumb" watch that has 10 years battery life.

• 1123581321 1y ago
  Or that constantly charges with a solar face or mechanical motion.
  • _giorgio_ 1y ago
    You can get a Rolex
    • 1123581321 1y ago
      In my case it’s just a Citizen chronograph from eBay for $100.
      • jaian 1y ago
        A Casio 5610 also charges with sunlight. To me it is the ultimate watch.
• wslh 1y ago
  Sure, but I was talking in the context of smart watches that have several health sensors.