To check the battery charge when it is not installed in the FreeStyle or FreeStyle 5, turn the
battery on its back and press the TEST button. The battery gauge indicator lights (25-100%) will
illuminate, to the left of the TEST button, to indicate the level of the battery pack charge.
Portable Oxygen Concentrator
Figure 5.4: Keypad Battery Status Indicator
Figure 5.5: Battery Pack TEST Button
TEST
Button
MN220-1 B 26