Battery Charger Instructions
Set the battery charger to the correct voltage, usually 12 volts for a car.
Switch the output selector to the desired number of amps. The lower the number of amps, the longer it takes to charge.
Attach the positive battery charger clamp to the positive post first for batteries that are negative-grounded, as most car batteries are. Attach the negative battery charger clamp to the negative post.
Plug the battery charger into a grounded outlet. Charge the battery until the ammeter needle indicates that the battery is charged. Unplug the charger when the ammeter indicates a full charge. Remove the clamps, negative first.