Checking the power reserve
Indication of power reserve in levels
Level
Power reserve
indication
Duration
(approx.)
Power reserve is
sufficient.
Meaning
OK for normal use.
18
3
10 - 7 months
Power reserve is
OK.
2
7 - 1 month
1 month - 3 days 3 days or shorter
Power reserve is
getting low.
Charge immediately.
1
0
Insufficient
charge warning
has started.