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Excellent information and analysis! Thank you for taking the time to clarify.
It appears that Omega's selection of a capacitor instead of a battery provides a better long-term solution than the competitors who chose battery storage.
: Just a little addition.
: Capacitors DO have a finite life. Over time,
: the electrolyte in the capacitor can break
: down. This can result in a decrease in
: capacitance. Typically capacitor life is
: quoted at the maximum rated tempearture and
: charge rate.
: An average capacitor can expect to survive for
: 1000 hours, at 105C without loosing more
: than 20% of its capacity. For each 10C drop
: in average temp (your wrist is about 35C),
: the life is expected to double.
: SO, 105-35=70 (7 "doublings")
: 1000 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 128,000
: hours
: 128,000 / 8760 (hours in a year) = 15 years
: FINALLY, since the capicitor is not likely
: charged at its maximum rate, you can expect
: several more multiples of life. (say 2 to 3
: times)
: SUMMARY: The watch should be good for 30-45
: years before the Capicitor would need to be
: changed out.
: How about that!! A real life application for
: Engineering Textbook calculations!!
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