I am thinking of purchasing a BatteryGeek CPAP Battery. How do I know if I also need to purchase the BatteryGeek 150 Sine Watt Inverter?

The BatteryGeek 150 Sine Watt Inverter is needed if your CPAP machine is a ResMed or Fisher Paykel brand. Also, if you wish to charge your battery through a cigarette lighter in your car, then the Inverter is required. More.

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