Honeywell Captuvo SL22 Quick Start Manual page 4

Power
The terminal requires 12 Volts DC input for battery charging; the
power adapter on the power cable converts the voltage from the
power source to 12 volts DC. Use only a UL Listed power supply,
which has been qualified by Honeywell with output rated at 12VDC
and 5A amps with the device.
Honeywell recommends that you leave the ChargeBase connected
to its power source at all times, so that it is always ready to use.