Crown Battery 18-85S-23

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. Be sure to 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

Opportunity/ Opportunity Fast Charge battery procedure

Enter the current charge of the battery in amperes

Opportunity charge is generally between 25-30 amperes per 100 ampere hour

Opportunity Fast Charge is generally 45-55 amperes per 100 ampere hour

Is the battery operating between 20% and 80% of its state of charge?

If the charger is rated higher than the connector on the battery, battery modifications will be needed.

The battery recording device allows the manufacturer and the user to diagnose problems and to correct and fine tune the operating system.

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

Old battery removed successfully?

New battery installed successfully?

Enter the voltage reading of the new battery

Sign off on the battery replacement

- Lead Acid Motive Power Batteries can become unbalanced or sulfated if they are not recharged or equalize charged on a regular basis

Likewise over-discharging or unbalanced discharge can cause low uneven cell voltages. The treatment for restoring the battery to its full potential involves charging and discharging the battery in a very tightly controlled manor

This is a last resort remedy in order to salvage a battery that's been allowed to get into this condition. This may or may not be successful, as sulfate is extremely hard to remove from the cell plates and if let in this condition, may not be reversible

A. Charge the battery as normal to a fully charged condition.

B. Record all individual cell voltages and specific gravities. These readings will be used later to measure how successtul the treatment was.

C. Starting with a cool (less than 80°F) fully charged battery, charge the battery at 2.5 amps per 100 amps of battery capacity. A 24-85FC-21 has a capacity of 850 A.H. Therefore the charge rate would be 21 amps. Charge the battery for at least 24 hours. Stop the charge, if the battery temperature goes to 120°F or higher.

A. Let the battery cool back down to about 80°F

This is the complete recharge of a battery after it has been fully or partially discharged during normal operation. In general, a cycle charge is based on an 8‐hour charging cycles, but can be extended, depending on need

A freshening charge is used to bring a battery to a fully charged condition before it is placed in service or when it has been standing idle for a short period. It takes about three hours at the finish charge rate (3‐6 amperes per 100‐ampere hours of the battery’s 6‐hour capacity rating)

When a battery is placed on charge, the opposite action of battery discharging takes place; the sulfate in the active material of the plates is driven back into the electrolyte

This reduces the sulfate in the plates and increases the specific gravity of the electrolyte and the electrochemical process continues until the on-charge cell voltages reach 2.50 to 2.70 volts per cell, depending on the type of charging equipment used

Finish rate or "normal" rate is that current which can be used safely any time charging is required and which can be continued after the completion of the charge without causing excessive gassing or high temperature resulting from overcharge. The finish rate is shown on the nameplate of Crown Batteries

Generally, the finish rate is 3.5 amperes per 100 hours of the battery's 6-hour rated capacity. A partially or completely discharged battery can safely handle currents much higher than the finish rate, but as it approaches full charge, whatever charging rate is used must be reduced to the finish rate