Did you ever look at the Operators Manual?
It tells you exactly what to do and what you should observe. No one will give you a better answer than what is below. Well factory rep on the phone is better but......
Treatment of Sulfated Batteries
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.**
Step 1.
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 successful 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.
Step 2.
A. Let the battery cool back down to about 80°F
B. The battery can now be discharged.**Using a discharge rate of 1.33 per 100 amps of the battery
capacity. A 24‐85FC‐21 battery with a capacity of 850 amps will need to be discharged at 11‐12 amps
for 96 hours.**DO NOT allow any cell to fall below 1.50 volts while on discharge.**Stop the discharge test
if any cell falls below 1.50 volts.
Step 3.
A. Charge the battery as normal to a fully charged condition.
B. Record all individual cell voltages and specific gravities.**
C. Compare the readings to the initial readings taken and note if there is any increase in gravity and
voltage.
Step 4.**
A. If the treatment restored the battery to normal conditions (Sp. Gr.**1.285‐1.300 and voltage 2.13 –
2.18) and all cells are fairly equal and the treatment was successful.
B. If the readings are still uneven or no improvement was gained, then repeat steps #1 thru #3
Step 5.
A. If after the second series of treatment the battery does not improve, the battery should be considered
unrepairable and should be replaced.
It tells you exactly what to do and what you should observe. No one will give you a better answer than what is below. Well factory rep on the phone is better but......
Treatment of Sulfated Batteries
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.**
Step 1.
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 successful 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.
Step 2.
A. Let the battery cool back down to about 80°F
B. The battery can now be discharged.**Using a discharge rate of 1.33 per 100 amps of the battery
capacity. A 24‐85FC‐21 battery with a capacity of 850 amps will need to be discharged at 11‐12 amps
for 96 hours.**DO NOT allow any cell to fall below 1.50 volts while on discharge.**Stop the discharge test
if any cell falls below 1.50 volts.
Step 3.
A. Charge the battery as normal to a fully charged condition.
B. Record all individual cell voltages and specific gravities.**
C. Compare the readings to the initial readings taken and note if there is any increase in gravity and
voltage.
Step 4.**
A. If the treatment restored the battery to normal conditions (Sp. Gr.**1.285‐1.300 and voltage 2.13 –
2.18) and all cells are fairly equal and the treatment was successful.
B. If the readings are still uneven or no improvement was gained, then repeat steps #1 thru #3
Step 5.
A. If after the second series of treatment the battery does not improve, the battery should be considered
unrepairable and should be replaced.
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