How Charging the Lead Acid Battery(4)? How Charging the Lead Acid Battery(4)? Whereas the voltage settings in Figure 4-4 apply to low-pressure lead acid href="http://www.good-battery.co.uk">batteries with a pressure relief valve setting of about 34 kPa (5 psi), the cylindrical SLA by Hawker requires higher voltage settings. These
voltage limits should be set according to the manufacturer’s specifications. Failing to
apply the recommended voltage threshold for these batteries causes a gradual decrease in
capacity due to sulfation. Typically, the Hawker cell has a pressure relief setting of 345
kPa (50 psi). This allows some recombination of the gases during charge. An SLA must be stored in a charged state. A topping charge should be applied every six
months to avoid the voltage from dropping below 2.10V/cell. The topping href="http://www.good-battery.co.uk">charge requirements may differ with cell
manufacturers. Always follow the time intervals recommended by the manufacturer. By measuring the open cell voltage while in storage, an approximate charge-level indication
can be obtained. A voltage of 2.11V, if measured at room temperature, reveals that the cell
has a charge of 50 percent and higher. If the voltage is at or above this threshold, the href="http://www.good-battery.co.uk">battery is in good condition and only needs a full
charge cycle prior to use. If the voltage drops below 2.10V, several discharge/charge
cycles may be required to bring the battery to
full performance. When measuring the terminal voltage of any cell, the storage temperature
should be observed. A cool battery raises the
voltage slightly and a warm one lowers it. more info:www.good-battery.co.uk
