Steps for Filling Electrolyte and Charging a Conventional Battery
1. Prepare the battery, required tools, and electrolyte with a specific gravity of **1.250 ± 0.01** in accordance with the standard. Wear protective gloves and safety goggles to prevent direct contact with the acid.
2. Open all vent caps. Slowly fill the electrolyte into each of the 6 cells until it reaches the specified UPPER LEVEL.
3. Let the battery stand for approximately 30 minutes to 1 hour. If the electrolyte level drops, refill until it reaches the bottom edge of the vent well. Do not overfill.
4. Check the battery voltage to set the appropriate charging parameters.4.1 Measure the voltage using a multimeter or clamp meter. Set the device to voltage mode, connect the positive (red) lead to the positive terminal and the negative (black) lead to the negative terminal.
4.2 Compare the measured voltage to determine the appropriate charging time and current.
Voltage Comparison Table: Battery Status and Recharge Time for Automotive Battery
5. Charge the battery using an AC 220V charger.5.1 Connect the battery terminals to the charger correctly: positive (+) to positive and negative (–) to negative.
5.2 Turn the charger switch to the ON position and adjust the voltage and current according to the required charging settings.
5.3 Monitor the charging current (amps) to ensure it matches or is close to the specified value, then start timing the charging process.
5.4 When the charging voltage rises above 16–18 volts or the required charging time is reached, set the voltage and current to OFF and switch off the charger.
5.5 Allow the battery to rest for at least 30 minutes, then measure the voltage again. The reading should be within the standard range.
*Note: The standard charging current for a cabinet-type charger (AC 220V) for a single battery typically shows a charging voltage of approximately 17–18 volts when the battery is fully charged.
Precautions for Battery Charging
