See BU-404: What is Equalizing Charge.) A power supply can also reverse sulfation. The time in overcharge is critical and must be carefully observed. You can also use the power supply to equalize a lead acid battery by setting the charge voltage 10 percent higher than recommended. If you need float charge for operational readiness, lower the charge voltage to about 2.25Vcell. Once the battery is fully charged and the current has dropped to 3 percent of the rated Ah, the charge is completed.Īlso disconnect the charge after 1624 hours if the current has bottomed out and cannot go lower high self-discharge (soft electrical short) can prevent the battery from reaching the low saturation level. Select the charge current according to battery size.įor lead acid, this is between 10 and 30 percent of the rated capacity.Ī 10Ah battery at 30 percent charges at about 3A the percentage can be lower.Īn 80Ah starter battery may charge at 8A.Ī 10 percent charge rate is equal to 0.1C.) Observe the battery temperature, voltage and current during charge.Ĭharge only at ambient temperatures in a well-ventilated room. To charge a 12-volt lead acid battery (six cells) to a voltage limit of 2.40V, set the voltage to 14.40V (6 x 2.40). Lead Acid Before connecting the battery, calculate the charge voltage according to the number of cells in series, and then set the desired voltage and current limit.
MAC OS 8 EMULATOR ONLINE YAROMATE FULL
Because of difficulties in detecting full charge with nickel-based batteries, I recommend charging only lead and lithium-based batteries manually.
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