Crown Battery 18-85-21

Warning: This procedure requires trained personnel!

If battery is not in the truck, install it before proceeding

Enter the current battery charge in amperes

If the charger is rated higher than the connector on the battery, proceed with the following modifications

After modifications, adjust the charger settings

Enter the new battery charge in amperes

Check uniformity of battery cells

Enter the state of charge of the cells

Check if cells require equalizing charge

Note: Unnecessary equalizing charges can result in significant loss of battery life caused by overcharge.

Sign off on the battery maintenance

Warning: Battery replacement should be done by trained personnel only!

Old battery removed successfully?

New battery installed successfully?

Enter the number of operations/charge cycles of the new battery

Enter the expected life expectancy date of the new battery

Enter any issues encountered during the battery replacement

Sign off on the battery replacement

Battery fully or partially discharged during normal operation?

Enter the battery's 8-hour charging cycle

Enter the finish charge rate (3‐6 amperes per 100‐ampere hours of the battery’s 6‐hour capacity rating)

Enter the on-charge cell voltages (2.50 to 2.70 volts per cell)

Enter the finish rate (3.5 amperes per 100 hours of the battery's 6-hour rated capacity)

Determining if a Battery is Properly Charged

Warning: This inspection requires trained personnel with PPE!

Is the battery still in the vehicle?

If the battery is still in the vehicle, turn off the power switch and unplug the battery from the vehicle

Allow the battery to remain on open circuit (do not charge or discharge) for 30 minutes or longer

Fill in the Crown Battery Inspection Report. Include battery type, serial number, etc.

Read and record the specific gravity and open circuit voltage for all cells of the battery

Read and record the pilot cell temperature

Record the temperature-corrected specific gravity readings. Use a temperature correction thermometer. Use the pilot cell temperature for the temperature correction of all the cells.

It is not necessary to read the temperature of every cell unless the temperature difference between center cells and outside cells of the battery is 12°F or more