ResMed Astral User Manual page 6

2. Connect the other end of the AC power supply cable into the
mains power outlet. Charging is indicated by
Indicators section in this guide).
Note: If required, the External Battery DC output cable can be
connected into the DC input port of the Astral device while the
External Battery is charging. The Astral device will then continue
to operate using mains power.
3. A fully charged External Battery is indicated by . To
discontinue charging, disconnect the External Battery from
the AC power cable.
Powering on the External Battery
To power on the External Battery:
• Connect it to an Astral device that is powered on or;
• Press .
Note: The External Battery automatically powers off after 5
minutes of inactivity.
Using and recharging the External Battery
When connected to Astral and mains power, the External
Battery recharges (refer to the Charging sequence section in this
guide).
Using and recharging with the Astral device
Connect a fully charged External Battery to the Astral device to
provide up to a total of 16 hours power during typical use.
Refer to illustration B.
1. Connect the External Battery DC output cable into the DC
input port of the Astral device.
2. Connect the AC power supply cable to the DC input port of
the External Battery.
3. Plug the other end of the AC power supply cable into the
mains power outlet. The AC mains indicator on the Astral
interface will illuminate.
Using and recharging two External batteries with the Astral
device
A second fully charged External Battery can be connected to
the Astral device to provide up to a total of 24 hours power
during typical use. A maximum of two External batteries can be
connected to the Astral device.
CAUTION
Do not attempt to connect more than two external batteries.
Battery specific messages and alarms on the Astral device
will not operate for any additional units.
Refer to illustration C.
1. Connect the first External Battery DC output cable into the
Astral DC input port.
2. Connect the second External Battery DC output cable into the
DC input port of the first External Battery.
3. Connect the AC power supply cable to the DC input port of
the second External Battery.
4. Plug the other end of the AC power supply cable into the
mains power outlet.
4
(refer to the