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What does a ‘Battery HOT Warning’ message mean?

This message is displayed on Inogen oxygen concentrators. The battery has exceeded it’s temperature limit while the concentrator is running on battery power. If possible, move the concentrator to a cooler location or power the unit with an external power supply and remove the battery. If the message persists the concentrator may need a service.

This is a medium-priority alert message and is accompanied by a triple beep repeated every 25 seconds, and a flashing red light.