battery power

[Engine 88]

FYI I just came back from a hunting trip on a remote Georgia Island . I powered my Resperonics series M cpap with a battery for 3 full nights without charging. My pressure is set at 12 and the machine ran great all 3 nights.The battery was a 79 AH group 24 gel deep cycle battery.The island is without power.I think it would of run at least a week or possibly more without charging.I did not run the humidifier.My machine uses about 2 amps per hour.The more pressure your machine is set at the more power it will use.