Thanks for the great replies and ideas. The Company I purchased through did reduce the sales price by the cost of the rental and I was able to get a few other little perks thrown in with the deal so I am happy with the purchase. I purchased the 16 cell battery also. I use oxygen at night while I sleep at a setting of 2 lph and do have a Respironics Home Concentrator that is a continuous flow for home use. I wanted the G3 for travel and camping as most of the places we camp don't have hookups so we rely on generator power for battery charging. Cannot run generator after 10 PM so the G3 will rely on it's battery or maybe plugged into 12vdc? I am lucky that I can get by at 2 lph because I did crank the G3 up to setting 4 and it really starts cranking it on, not sure batteries would last to long at that setting plus it gets loud. I do like the G4 but the battery life is just not enough for my needs.
Does anyone know how much power (amps) this will draw if plugged into a 12vdc socket?
Bill
On the power question I found that it uses 20 watts at a setting of 2 so I think that works out to 1.7 amps x 8 hours sleep = 13.6 amps, not to bad but who sleeps 8 hours.:Z