CAIRE AirSep FreeStyle 5 Patient Manual page 209

FreeStyle 5™
The lithium ion rechargeable battery that is used in the FreeStyle
5 unit does not need
to be fully depleted before recharging. It is recommended to
charge the battery regardless of the battery's capacity level after
use.
The battery will charge when the unit is off as well as while the
unit is running off the AC or DC power supply.
Lithium batteries may permanently lose capacity when exposed
to extremely hot temperatures with the batteries fully charged or
completely depleted. For extended storage, it is recommended
that batteries be charged 25 to 50% and remain within a
temperature range of 73° F (23°C) ± 2°C.
"No Smoking – Oxygen in Use" signs must be prominently
displayed in the home, or where the oxygen concentrator is in
use. Patients and their caregivers must be informed about the
dangers of smoking in the presence of, or while using, medical
oxygen.
MN167-1 rev. D
EN
EN-11