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How Do I Charge the SLA Battery?

Some machines systematically charge the SLA battery, for example some home alarm or backup systems. Meaning, you do not have to take the battery out and charge it on a battery tender.

If you do need to charge your SLA battery with a battery tender, selecting the correct battery charger will impact the performance and service life of a sealed lead acid (SLA) battery. As a general rule of thumb when selecting a charger for an SLA battery is to use one that is no more than 20% of the capacity rating of the battery (at a 20hr. rate).

Example; to charge a 12 volt / 7.5Ah battery select a charger with a maximum charge output of 1.5 Amps (7.5 x 0.20 = 1.5).

To charge an automotive battery, refer to your owner´s manual and your battery charger manual for instructions. Read and follow all safety and handling instructions that came with your charger and battery. Battery chargers will charge a battery based on its condition and at a rate appropriate for its state of charge. Charging voltages run from 13.8 volts to a maximum of 15.5 volts for most applications. Finally, remember that batteries contain sulfuric acid that can cause severe burns, and hydrogen-oxygen gases that can be explosive. Charge in a well-ventilated area. Be sure to follow all safety and handling.