I just have to say this. Button compasses are mostly for military SERE kits. They are in the kits so that they can be concealed, even swallowed if captured. They are to aid in general direction travelling, primarily at night. Providing you can escape captivity. Aircrew personnel also carry real compasses for navigation. The button is for eminent capture, to be concealed, hopefully.

I see no value to putting one in a "survival" kit unless you are planning on going behind the lines in enemy territory. You should be able to generally tell N. E. S. and W from the sun. A button compass really can't do much more than the general directions.

If you want to navigate, get a real compass and learn how to use it properly. Practice navigating with the compass and with a map. The Suunto or Brunton compasses come in all sizes and styles, find one that you like and learn it.

Button compasses are a novelty. If you want a general directional compass, get one of the little ones that go on a watchband. Still not that useful for any sort of real navigation.