ResMed Astral Series User Manual page 52

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.
To prepare the internal battery for long-term storage:
1. Check that the battery charge level is between 50 and 100%. If not, charge the device to at least
50% prior to storage.
2. Remove the power cord from the Astral.
3. Turn off the device.
To recharge the internal battery:
1. Connect the device to mains power.
2. Charging commences as indicated by a flashing battery charging indicator symbol in the Information
bar.
Notes:
• When charging a completely depleted battery, it will normally take up to 30 minutes to increase battery capacity
from 0% to 1%.
•
If the device has been stored outside the operating temperature range, an alarm message (Power fault / No
charging) may appear. You can still continue using the device, however, if the alarm persists for more than 2
hours the battery may need replacement.
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