I picked up a Coleman Max about six months ago when Walmart had them on clearance - thanks to whatever member tipped me off in this forum. Anyway, I was in a hurry that day and didn't wander from the Clearance section back to Sporting Goods, so I never bought any propane canisters for it. Skip to six months later and Sandy is rolling in. I popped back over to Walmart to pick up another couple cases of water and figured I'd grab a few canisters in case I lost power and the utility company needed to shut off the gas. Of course they were sold out. No problem, I have a couple flats of Sterno and a folding camp stove to use with them, and I have an alcohol stove as well, so not like I was completely unprepared.
Anyway, I grabbed a few canisters tonight, but realize I have no idea how much burn time to expect from each canister, and thus I don't know how many to store. Also, what is the shelf life for the canisters?