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E-123
Power Supply: Solar cell and one rechargeable battery
Approximate battery operating time: 6 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
• 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-113).
20 months when the watch is left in the sleep state (display off) after a
full charge.
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