Covidien Puritan Bennett 560 User Manual page 104

Note:
When the device is in storage it should be recharged monthly to maximise battery life.
If the battery is stored for more than one month at a temperature greater than 21 °C (70 °F), or for more
than one or two weeks at a temperature greater than 45 °C (113 °F), the reserve capacity of the battery
may be affected. It will then be necessary to recharge the battery before using it again.
If the ventilator has been in storage for longer than 30 days connect it to an AC power source,
turn on the unit by the I/O switch at the rear of the ventilator, and let it charge for 15 minutes
prior to starting ventilation.
Note:
Fully charge the internal battery prior to disconnecting from AC Power source ("mains").
The battery should not be stored for more than two years, whatever the conditions.
6-6 User's Manual