29
Battery
Battery Functions
F
E
F
E
F
E
F
E
Remaining battery
capacity indicators
Display switch
Capacity ratio when new
5
100 to 80%
4
80 to 60%
3
60 to 40%
2
40 to 20%
1
20 to 0%
(Flashes at 5 to 10%)
The battery control unit provided on the battery
has three general functions:
1
it serves as a
remaining capacity gauge,
2
it communicates
battery information, and
3
servicing.
Remaining capacity gauge
The capacity gauge has two functions, one
which controls the remaining capacity by calcu-
lating the current, and another called a “capac-
ity learning” function, which senses the degree
to which the battery has deteriorated and uses
that as the degree of the battery deterioration.
The display lamps mounted on it display the
capacity status in six stages.
Function 1. 6-stage display
Pressing the display switch displays the re-
maining capacity of the battery for five sec-
onds, using five display lamps, in six stages
(the first lamp is used to display two stages,
depending on whether it is flashing or lighted).
Function 2. Battery deterioration display
As the battery deteriorates, when the capacity
decreases to 80% or less of its original level,
the top stage (5th stage) of the display no
longer lights after the battery is charged. As the
deterioration progresses, when it reaches 60%
or less, the fourth stage no longer lights after
the battery is charged.
Function 3. Out of guaranteed tempera-
ture range display/error diagnosis dis-
play
1
If the battery temperature drops to -5°C or
less, the capacity gauge no longer dis-
plays the capacity accurately, and the
gauge flashes, warning that the tempera-
ture is out of the range for which opera-
tion can be assured. (See the earlier sec-
tion on discharging the battery.)
2
If the temperature sensor inside the bat-
tery breaks down, the fourth LED flashes.
3
If the temperature of the battery becomes
abnormally high, the first, third and fifth
LEDs flash.
LEDs displaying remaining
capacity flash
1st, 3rd, and 5th
LEDs flash
4th LED flashes
