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.
• 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.
While connected to mains power, the internal battery continues to charge when the device is operating
or in standby.
When the internal battery is being used to power the device, the amount of charge remaining in the
battery is displayed in the information bar as shown in the following table.
Display Description
When the internal battery is in use, but the device is not ventilating, the battery charge level is displayed.
When the internal battery is in use during ventilation, the remaining usage is displayed as estimated by current
operating conditions.
When the internal battery is charging, the charge battery symbol and percentage charged is displayed.
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 when there is a noticeable reduction in usage
time when fully charged.
Storing and recharging
If the internal battery is not used, it must be recharged every six months.
It takes approximately four hours to fully recharge the internal battery from depletion; however this can
vary depending on environmental conditions and the device operating state.
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