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


Or that constantly charges with a solar face or mechanical motion.


You can get a Rolex


In my case it’s just a Citizen chronograph from eBay for $100.


A Casio 5610 also charges with sunlight. To me it is the ultimate watch.


Sure, but I was talking in the context of smart watches that have several health sensors.




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