Victorinox CHRONOGRAPHS Watch User Manual
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Light Function
The lighting module of your Night Vision watch operates off of a separate
battery power source (2 battery cells) than the watch movement itself
(1 battery cell). Batteries are 3 volt 2016 Lithium batteries.
Please use an authorized Swiss Army Brands service center in the
event either the light module or watch battery require replacement.
See page 61 for information on replacing watch movement battery.