My watches last for decades; so, I already know how long they'll operate on a fresh battery. Replacing the battery every 3 years gets it done both before it reaches its expiration and before watch operation drains it completely. Additionally, I get to do it at my convenience without being inconvenienced by a stopped watch. The cost of a battery (<$8) defrayed over 3 years just isn't a deterrent. Why go coach when for a nickel more you can go first class.
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