ELECTRICAL SYSTEM
0608ME All Maintenance Manual 39
© Jan. 2024
Table 8-1
State of charge (%) Specific gravity
Open-circuit voltage (V)
Battery cell
6V 12V
100 1.277 2.122 6.37 12.73
90 1.258 2.103 6.31 12.62
80 1.238 2.083 6.25 12.50
70 1.217 2.062 6.19 12.37
60 1.195 2.040 6.12 12.24
50 1.172 2.017 6.05 12.10
40 1.148 1.993 5.98 11.96
30 1.124 1.969 5.91 11.81
20 1.098 1.943 5.83 11.66
10 1.073 1.918 5.75 11.51
• Recharge the battery in quick charging mode when
the battery level is 70 % or lower.
• Recharge the battery before use after taking it out of
storage.
• Storage in hot environments (above 32℃/90℉):
Avoid exposing the battery to heat sources during
storage since the battery self-discharges faster at
higher temperatures. If it’s necessary to store the
battery at higher temperatures monitor the specific
gravity or voltage more frequently (approximately
every 2 to 4 weeks).
• Storage in cold environments (below 0℃/32℉):
Avoid storing the battery in locations that may be ex-
posed to freezing temperatures since the battery
may freeze if not fully charged. If the battery is to be
stored in cold environments it must be fully charged.
NOTICE
Do not store the battery longer than 6 months in
hot or cold environments.
8.2 CHANGE THE CHARGING
CURVE
Note: The charging curve of the charger for lithium bat-
teries does not require any settings, so the following in-
structions apply to the charger for lead-acid batteries
only.
Fig. 1
Table 8-2
No. Description
1
Battery program update interface (if
equipped)
2 Digital display
3 EQ/Select key
4
Capacity indicator light
5
Charging voltage indicator
6 Charging current indicator
7
Battery voltage indicator
Change the curve:
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