Can I charge the Caire SeQual Eclipse 5 portable oxygen concentrator battery in the car?

The answer to this question depends on the settings of your device. All of the continuous flow and pulse settings are available while operating on DC power. When the unit is connected to DC power for all continuous flow settings up to 2.0LPM and all pulse flow settings from 1 to 9, the battery cartridge will charge. Be aware that the higher the setting, the slower the charge of the battery will be.