The battery in the Vaucanson Swiss-Made, five jewel movement is estimated to last for 1,825 days without a charge or battery replacement. That's extremely accurate Swiss timekeeping 24 hours a day for 1,825 days, continuously.

The secondary battery in the Vaucanson timepiece activates the patented UV-LED illumination system and it's engineered to last for over 11,000 pushes preprogrammed in 4 second intervals.

If you activated the illumination system 10 times a day, the battery would last an estimated 1,125 days; that's seeing time in low light or in the dark for 1,125 days without a charge or battery replacement.