Wrist Watch charged practically instantly


Electronic Wrist Watch charged practically instantly
Author: David Judbarovski, 79, systems engineering, principle inventor, retired
judbarovski@gmail.com, Israel

Ordinary, electronic wrist watch consumes about 50.0 mWh in a year.
In my case, it is ordinary looked wrist watch with quartz pulse generation, alarm and LED lighting, can be equipped by a tiny Li-ion rechargeable battery of some tens milligram by weight.
Being equipped additionally by conventional ultracapacitor of about 3.0 gram weigh (e.g. PHV-5R4H155-R), it allows to charge the watch practically instantly for about a month without new portion of charging being 4.0 mWh = 15.0 Joules
Being ones in a month procedure, it can prolong the battery lifetime for many years and for ultracapacitor too, if being supposed their shelf live so long. 
Two kinds of chargers are possible, the both can be small and light by weight: (1) an electrical one, or (2) powered by muscle force if being far from electricity sources.

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