I chose the Philips Respironix machine over the ResMed because it doesn't require an inverter to run off a 12V battery. The inverter eats extra power. The downside to using a battery is that you can't the humidifier.....again, it eats power. The humidifier on my PR machine is easy to detach and without it the machine is a lot smaller and lighter. I went without the humidifier on several weeklong trips last summer without any problems.
I sent an email to cpap battery.com to ask about run time on the C-100 battery at my 15/17 pressure. The answer was 1-2 nights. $300 for 1, maybe 2 nights????? No thanks.
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