More on charging times | Harbor Freight Tools 03418 manual

Operation (continued)

More on charging times.

1.When using a manual mode for charging, you can check the present level of a battery by using a hydrometer or electronic percent-of-charge tester (not included). Be sure to read and follow all of the instructions in the manual for these testing tools.

Note: Batteries that are only 25% charged or lower can easily freeze.

2.When you determine the percent of charge needed, you can determine the batteries needed charging time by using the formula below. First you will need to know the AMPERE HOURS or RESERVE CAPACITY. If it is not listed on the battery, check with the manufacturer of the battery.

Formula: Amp Hour Rating x Percent of Change Needed

X 1.25 = hours to charge

Amp Setting Selected on Charger

Example:

Battery state of charge = 25%

Battery needs = 75% or .75

Amp setting on charger = 10

Amp hour rating of battery = 60

60 times .75 divided by 10 = 4.5

4.5 times 1.25 = 5.6 hours needed to charge.

DEEPLY DISCHARGED LEAD-CALCIUMbatteries on many of the newer vehicles may require an activation period when deeply discharged. This period may last from 4-8 hours. If you notice that the ammeter needle is at or near zero at the beginning of the charging process, your battery is less than 25% charged and needs to be activated or pre-charged.

You know it needs pre-charge activation when the ammeter reads zero and neither the Charge Complete or the Reverse Connect lights are lit. Pre-charge activation is needed if the battery is already known to be dead and the Charge Complete light is on. If the Charge complete light is lit, do not attempt pre-charge activation until the battery is tested with a hydrometer or other testing methods and found to be low or dead. If you determine that the battery needs pre-charge activation, take it to a qualified service technician.

Troubleshooting

No Ammeter Reading:

1.Make sure the charger is plugged in.

2.Unplug the unit and check all of the connections making sure clean contact is made.

3.Check that the battery isn’t damaged and incapable of being charged.

4.Double check that you have selected the correct settings.

5.Make sure you allow enough charging time.

SKU 03418

For technical questions, please call 1-800-444-3353.

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