Why not just buy a new lighter. They are so cheap they are practically free, tiny, and work significantly better than a spark-lite so long as they have fuel.

You don't really take old lighters you find along the road as trash and put them into survival kits do you? who knows how long they have been sitting there rotting away. Why take the chance on something when a fresh,new lighter is so cheap?

I have always avoided to mini-spark things if possible.(even the good ones) They are waaaaay to dependant on the proper type of tinder, not to mention trying to use one when it's -50 deg cel outside.