The CHG-75 battery charger is designed to charge lead acid
batteries that provide emergency standby power for a Fire Alarm Control Panel
(FACP) and related equipment. Two 12-volt batteries are used in series to supply
a nominal 24 VDC. The battery charger is compatible with any FACP that uses
lead-acid batteries with a rating of 25 AH (amp-hours) to 75 AH. The FACP must
have a feature that allows the disabling of the control panel battery
charger.