2-2 
Anesthesia Gas Scavenging System (AGSS) connectors are at the rear of the A8/A9. 
When the A8/A9 uses AC power supply, the A8/A9 power management system supplies power 
for its main system while charging its internal battery. In case of an AC power failure, the A8/A9 
operates on battery power. The main system switch can power on and off the system. The four 
auxiliary AC sockets on the A8/A9 at the rear of the machine operate independent of the main 
system switch. 
 
  The heater for the patient breathing circuit system does not operate when the 
A8/A9 is working on battery power.