SUUNTO D9 - Manual (Page 102)

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- Reduced gradient (variable) “M” values based on diving habit and dive viola-
tions. The “M” values are tracked up to 100 hours after a dive.
- The EAN and oxygen exposure calculations are based on recommendations
by R.W. Hamilton, PhD and currently accepted exposure time limit tables and
principles.
Battery
D9:
- One 3 V lithium battery: CR 2450
- Battery storage time (shelf life): Up to three years.
- Replacement: Every two years or more often depending on dive activity.
- Life expectancy at 20°C [68°F]:
- 0 dives/y -> 2 years
- 100 dives/y -> 1,5 years
- 300 dives/y -> 1 year
The following conditions have an affect on the expected battery lifetime:
- The length of the dives.
- The condition in which the unit is operated and stored (e.g. temperature/cold
conditions). Below 10°C [50°F] the expected battery lifetime is about 50-75%
of that at 20°C [68°F].
- The use of the backlight and audible alarms.
- Use of the compass
- The quality of the battery (some lithium batteries may exhaust unexpectedly,