I am posting this at the request of another member.
First this is not my concept, that honor must go to the folks at Epipe-mods.
There is not actually a switch used. Just a open circut, which is closed when button on top is pressed.
The ground is in the bottom of the battery shaft, and the positive is at the top.
So the ground is continous, and the positive connection is made when the button makes contact with the 1/2 key ring.
I drill a 7/8 inch hole 6-12mm deep, this will hold the 1/2 keyring which is soldered to the positive wire. Also allows the button to be enclosed. The button is either aluminum or wood with a Steel plate.
Then switch to a 3/4inch drill bit and drill deep enough for your battery plus 1 or 2 mm(depends on what you are using for ground plate)
then I use a 8mm bit a drill 2mm deep hole to hold 8 x 2mm magnet.(If you are not using a button with spring built in...drill hole deep enough to allow for spring.
Hopefully this makes sense.
And in closing ....Any credit for this idea must go to the folks at Epipe-mods.
And any mistakes are mine.
First this is not my concept, that honor must go to the folks at Epipe-mods.

There is not actually a switch used. Just a open circut, which is closed when button on top is pressed.
The ground is in the bottom of the battery shaft, and the positive is at the top.
So the ground is continous, and the positive connection is made when the button makes contact with the 1/2 key ring.
I drill a 7/8 inch hole 6-12mm deep, this will hold the 1/2 keyring which is soldered to the positive wire. Also allows the button to be enclosed. The button is either aluminum or wood with a Steel plate.
Then switch to a 3/4inch drill bit and drill deep enough for your battery plus 1 or 2 mm(depends on what you are using for ground plate)
then I use a 8mm bit a drill 2mm deep hole to hold 8 x 2mm magnet.(If you are not using a button with spring built in...drill hole deep enough to allow for spring.
Hopefully this makes sense.
And in closing ....Any credit for this idea must go to the folks at Epipe-mods.
And any mistakes are mine.