Yup, mechanical all the way. Wish the wood ones were mechanical as well. I had a problem with a juice I was using and it swelled the oring and leaked all over the place. If it wasn't a mechanical switch, I would have fried the wires many times over. This is what kept me from ordering a 18490 wood. I've since changed juice vendors but still, always watching the oring. Can't wait till these metal ones come out. I already have the batteries.


Thanks for all your input very much appreciated 
