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Electric Forklift Battery Maintenance

Feb 18, 2026

Forklift Batteries
1. Utilizes polyester fiber tube sleeves, offering excellent elasticity, small pore size, low internal resistance, and high gas permeability.
2. Features fully insulated flexible connectors, ensuring zero leakage current.
3. Incorporates a valve structure with a pop-up top plug, equipped with a specialized electrolyte level indicator.
4. Fitted with filler caps that facilitate automatic water replenishment.
5. Employs high-quality imported microporous diagonal separators, characterized by high porosity and low internal resistance.
6. Constructed using PP (polypropylene) materials for the battery casing and lid, providing superior impact resistance.
7. Features a patented terminal sealing structure that completely prevents plate growth and electrolyte leakage.

 

Routine Maintenance
1. The battery should be regularly topped up with distilled water (pure water).
2. If an electric forklift is to remain idle for an extended period, the battery should be fully charged before storage. Furthermore, it should be recharged at intervals of approximately 1 to 2 months.
3. For multi-shift operations, motor-driven warehouse forklifts require a spare battery (as continuous operation leads to rapid power depletion and increased wear and tear on the battery).
4. When charging the battery, the charging circuit must be completely disconnected from the chopper (controller); otherwise, in addition to interfering with the charging process, the overvoltage generated by the charger could damage the chopper.
5. Do not store the battery in a horizontal position.
6. Select an intelligent, multi-stage charger to prevent water loss caused by overcharging.
7. Opt for a high-efficiency electric hub drive system to minimize operating current draw.
8. Charge frequently or maintain a reasonable charging schedule-ideally, implement a planned charging routine (e.g., charging once every day or every two days).
9. Avoid storing the battery in a discharged state; storing a battery with insufficient charge is extremely detrimental to its lifespan.

 

Important Precautions
During the charging and discharging cycles of the battery, the water content within the electrolyte gradually diminishes due to electrolysis and evaporation, causing the electrolyte level to drop. If not replenished promptly, this can significantly shorten the battery's service life; therefore, distilled water should be added in a timely manner. Strictly avoid using bottled drinking water (purified water) as a substitute, as such water contains various trace elements that can have adverse effects on the battery. When adding electrolyte or water to a battery, observe the following precautions: the electrolyte level need only be 10 to 15 millimeters above the top of the plates. For batteries marked with two red lines, the electrolyte level must not exceed the upper red line. If the electrolyte level is too high, it will overflow through the small vents in the battery cover. Should this overflow spill between the positive and negative terminals, it will create a conductive path, leading to self-discharge. In such instances, the spilled electrolyte must be wiped away or thoroughly rinsed off with boiling water.
If an object accidentally falls into the battery while adding electrolyte, *never* attempt to retrieve it using a metal tool; instead, use a wooden stick or tongs to extract the foreign object. Using iron or copper wire to retrieve the object would allow metal ions-corroded by the sulfuric acid-to leach into the battery, triggering self-discharge and causing damage to the unit.
If a vehicle is to remain out of operation for more than 20 days, the negative battery cable should be disconnected to prevent potential electrical leakage or discharge issues.

 

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