Using The Internal Battery - ResMed Astral Series User Manual

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Using the internal battery

An internal battery is included in the Astral device. It ensures a continuous power supply when mains
power is disrupted and no external battery is connected to the device. When the Astral starts using the
internal battery as its power source, you are notified by the Using internal battery alert and with the
internal battery power source indicator.
The internal battery operates for approximately eight hours under typical conditions. During ventilation,
alarms will alert the user to a low battery condition. During standby, no alarms will be announced. The
user should regularly check the battery status.
WARNING
•
When using the Astral device as a backup ventilator, ensure the internal battery level is
checked on a regular basis.
•
As the battery ages, the available capacity decreases. When the remaining battery capacity is
low, do not rely on the internal battery as the primary power supply.
•
The internal battery is not intended to serve as a primary power source. It should only be used
when other sources are not available or briefly when necessary; for example, when changing
power sources.
CAUTION
•
Revert to AC mains power when the remaining capacity of the battery is low.
•
The internal battery may stop charging when ambient temperatures of 35°C or more are
reached. This will be indicated with a Power fault/No charging alarm message.
•
The internal battery will be depleted if the device is left in storage for an extended period of
time. During storage, ensure the internal battery is recharged once every six months.
•
Storing the Astral device at temperatures exceeding 50°C for extended periods will accelerate
battery ageing. This will not affect the safety of the battery or the device.
•
The internal battery should be replaced every two years, or sooner when there is a noticeable
reduction in usage time when fully charged.
While connected to mains power, the internal battery continues to charge when the device is operating
or in standby.
For more information on the expected operating time of the internal battery, see the Technical
Specifications.
Battery run time
The internal battery powers the Astral device for eight hours under conditions typical to the chronic home
ventilator-dependent patient.
Internal battery run time is determined by the:
•
percent charge
•
environmental conditions (such as temperature and altitude)
•
condition and age of the battery
•
device settings
•
patient circuit setup and unintentional leak.
The internal battery should be replaced every two years, or sooner when there is a noticeable reduction
in usage time when fully charged.
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