I've used cheap LED taillights/blinkies meant for bicycles as "flares" in the woods or fields when fire danger is high(I've seen guys get fired on the spot for tossing a cigarette butt, lit or not.). Stick the blinkies in the windows of a stalled car and they'll last a lot longer than the car's batteries will running the four-way flashers. For three bucks at Wallyworld you can buy a bunch and not much care how many uses you get out of them.
Slinger-
Please forgive me; I take a bit of offense at your opinion that a woman would have trouble striking an incendiary flare. My wife is quite petite at 108lbs and 5'4" tall. She can fire any kind of gun and can float gears in a semi truck and striking a flare is like striking a big match to her. I don't know what kind of woman your wife is, but most of the women I know can strike an incendiary flare just fine. I imagine yours could too.
:buddies: