F990
Charging
Indication of power reserve in levels
Always keep level 2 or above.
!
Charge immediately when power reserve is level 1 or 0.
Level 4 | ![]() | Power reserve is sufficient. Duration: 1.5 - 1.2 years |
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Level 3 | ![]() | Power reserve is OK. Duration: 1.2 years - 10 months |
Level 2 | ![]() | Power reserve is OK. Duration: 10 - 4 months |
Level 1 | ![]() | Power reserve is getting low. Duration: 4 months - 5 days |
Level 0 | ![]() | Level where insufficient charge warning starts Duration: 5 days or shorter |
- Duration means approximate time until power runs out and the watch stops at the level indicated.
- At the Level 0, the second hand starts to move once every two seconds (insufficient charge warning function).
Some functions become unavailable while this function is activated. - The function indication indicates “SMT OFF” and does not indicate the level of power reserve when temperature of the watch is too high or too low (non-chargeable state).
Check it again at a location of suitable temperature.