ELECTRICAL SYSTEM
AB16EJ Plus Maintenance Manual 73
© Mar. 2023
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 removing it
from storage.
• Storage in hot environments (above 32℃/90℉): Di-
rect exposure of the battery to heat sources should
be avoided during battery storage, and the battery
self-discharges faster at high temperatures. If storing
the battery in hot summer months, monitor the spe-
cific gravity or voltage more frequently (approxi-
mately every 2-4 weeks).
• Storage in cold environments (below 0℃/32℉):
Avoid placing batteries in places where the tempera-
ture is expected to reach the freezing point during
storage, as batteries may freeze at low temperatures
if not fully charged. If the battery is to be stored in the
icy winter months, the battery must be fully charged.
NOTICE
Do not store the battery more than 6 months in hot
or cold environments.
8.2 CHARGING FAULTS AND
SOLUTIONS
Charging Faults and Solutions (Lead-
acid Battery)
In case of charging failure, the 50% light, 75% light and
100% light will flash 1-6 times at the same time.
Table 8-2 Charging Faults and Solutions (Lead-acid Battery)
Fault
code
Indication Cause Solution
E01 bAt
3 lights flash
once
Output not connected
to battery or reversely
connected
Check the battery pack is properly connected. Check the
charger is properly connected. Inspect the individual cells
in the battery pack for damage.
E02 AC
3 lights flash two
times
Abnormal utility
supply (voltage)
Check the AC power cable is connected between the
charger and AC outlet. Make sure that the AC plug is
firmly inserted into the AC outlet.
E03 Hot
3 lights flash
three times
Overtemp cutout of
charger
When the charger inside or ambient temperature is too
high, the charger will cut out and enter the overtemp
cutout mode. Please place the charger in a well-
ventilated site. Disconnect the charger and wait 15-
20min before recharging.
E04 bAt
3 lights flash four
times
Overtemp cutout of
battery
When the battery temperature exceeds the preset value,
the charger will cut out to prevent overheat. After the
battery temperature drops, the charger will restart
automatically.
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