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). Select the
charge current according to
battery size. For
lead acid, this is between 10 and 30 percent of the rated capacity. A 10Ah
battery at 30 percent charges at about 3A; the percentage can be lower.
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Lead-acid batteries use a method of charging called 'constant current constant voltage' (CCCV). This process uses a regulated current. That current works to raise the terminal voltage within the battery until the limit of the upper charge voltage is hit. When that happens and it becomes saturated, the current drops.Feb 19, 2021
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To obtain maximum battery service life and capacity, along with acceptable recharge time and economy, constant voltage-current limited charging is best. To charge a sealed lead acid battery, a DC voltage between 2.30 volts per cell (float) and 2.45 volts per cell (fast) is applied to the terminals of the battery.
