Power Supply: Solar cell and one rechargeable battery

Approximate battery operating time: 5 months (from full charge to Level 4) under the following conditions:

•Watch not exposed to light

•Internal timekeeping

•Display on 18 hours per day, sleep state 6 hours per day

•1 illumination operation (1.5 seconds) per day

•10 seconds of alarm operation per day

•10 digital compass operations per week

•1 hour of altimeter measurement at 5-second interval, once per month

•2 hours of barometric pressure measurement per day

•6 minutes of signal reception per day

Frequent use of illumination runs down the battery. Particular care is required when using the auto light switch (page E-134).

20 months when the watch is left in the sleep state (display off) after a full charge.

E-145