The RPS II is great for airline travel and meets all FAA regulations for use on commercial airlines. In addition the RPS II is an ideal option for camping, hiking, biking and other more down to earth pursuits.
Extended Run Times From an Ultra Light Battery: At the heart of the RPS II is a powerful Lithium-Ion Battery like those found in most laptop computers. A single battery weighs under 2-pounds and will power your ResMed CPAP/BiLevel for 12-14 hours at 10CM.
Double Your Run Time with a Handy Coupler Kit: If you need more power you use the optional Coupler Kit to connect two RPS II batteries in series. When coupled the secondary battery will automatically take over when the first battery runs out; and batteries will recharge in series too!