© Mar. 2023 72 AB16EJ Plus Maintenance Manual
ELECTRICAL SYSTEM
NOTICE
If the Result 1 cannot be met even after several
attempts, the battery may have malfunctions.
6. Check the battery electrolyte level. Make sure the
electrolyte level is at the right height and add dis-
tilled water to the required level if needed.
7. Install the battery vent cover.
Adding Water
NOTICE
• For lead-acid batteries (requiring maintenance),
the electrolyte level should be checked after each
charging, and if the level is found to be low, add
water in time.
• The water shall be added after charging. Adding
water before charging may cause acid overflow
during charging.
• For batteries equipped with an automatic water refill-
ing system, when the electrolyte is at the lowest level
with the battery fully charged (the white dot of the
battery observation hole is not at the top), add water
immediately. It is recommended to use an automatic
water refilling machine for refilling, with the operation
steps as follows:
1. Open the bucket cover of the water refilling
machine.
2. Add deionized water.
3. Put back the bucket cover and connect the water
refilling plug.
4. Connect the quick connector between the water
refilling machine and the battery and turn on the
power switch to start automatic water refilling.
5. After water refilling is completed, the automatic
water refilling system will automatically stop.
6. Turn off the power switch and disconnect the
water refilling plug to complete water refilling.
• If the battery is not equipped with an automatic water
refilling system, check the electrolyte level after
charging. If the level is lower than the allowable
height (the white dot of the battery observation hole
is not at the top), wear gloves to add conforming dis-
tilled water or deionized water to the standard level
(1-2cm above the minimal level of the water filler
plug). Never add any acid solution.
Equalization
Equalization is the deliberate process of overcharging
the flooded/wet battery after it has been fully charged.
Equalize the battery only when its specific gravity is low
(less than 1.25) or its specific gravity exceeds the scope
(greater than 0.030) after the battery is fully charged.
NOTICE
• Verify whether the battery is flooded/wet battery.
• To prevent battery damage, the battery must be
equalized after a storage period of up to three
months from the date of delivery.
1. Check the electrolyte level height to ensure that the
level meets the specified requirements.
2. Verify that all vent caps are properly secured to the
battery.
3. Set the charger to equalization mode.
4. Charge the battery in equalization mode. The bat-
tery will bleed air in the equalization process (form-
ing bubbles).
5. Remove the vent cap every hour to measure the
specific gravity of all battery cells, and stop the
charging in equalization mode if the specific gravity
doesn’t increase any more.
Storage
• Fully charge the battery before storage.
• The battery should be stored in cool and dry environ-
ment (temperature 10℃-25℃/50–77℉, RH＜90%),
and charged every 3 months using the charger pro-
vided by the manufacturer.
• Disconnect the main power switch to eliminate po-
tential hazards that could cause electrical leakage of
the battery.
• The battery will self-discharge gradually during stor-
age. Monitor the specific gravity or the voltage every
4～6 weeks. The comparison of the state of charge,
specific gravity and open-circuit voltage is shown in
the following table.
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