>>Whichever device I put on the Lanyard will serve as a
>>backup to the Essential Gear Windmill Stormproof Butane
>>Lighter which I am purchasing just for this occasion to
>>replace the Mini Bic (and somtimes Permanant match) that I
>>normally EDC.

I googled on "Essential Gear Windmill Stormproof Butane Lighter" and established that it's a piezo-electric lighter:

"Piezo-electric ignition system eliminates the need for batteries or flints which fail when wet. Piezo is a mechanical system which produces a spark when the lighter ignition is pressed. Independent laboratory tests have found the piezo-electric system to be good for over 30,000 ignitions."

Just as an FYI, I have experienced failure of a piezo-electric lighter when it was left out overnight in temperatures of around -30 C. (My brother was building a house in Fort MacMurray, Alberta; I made the mistake of agreeing to spend Christmas with him and his family and ended up helping him install the wiring.) The lighter was one of those long barbeque grill lighters - not an expensive one - that we used to ignite the propane burners to warm up the house while we were working. I ended up having to drive to the local Mac's Milk (convenience store) to pick up a couple of books of paper matches. Experience left me a little bit leery of relying on a piezo-electric lighter in sub-zero temperatures. ("Once bitten, twice shy" sort of thing.)

More expensive p-e lighters may not have this problem, but I would check it out first. (Toss the lighter in the freezer overnight, or for a couple of days, then pull it out and see if it still works first time. If it doesn't, I would not consider replacing a trusty ol' Bic with it for this trip.)

Fwiw, I have left a mini-Bic in the freezer overnight and it's still lit first time within seconds of being picked up.