I tend not to post often I just wanted to give credit where credit is due. I ordered a precise 18650 two years ago. (Give or take a month or two). It is my daily pv to this day. I have never had it fail nor have I had to have anything replaced. Not even the spring. I have had to polish it to a chrome finish just to hide the nicks I have put in it but that was my own doing. I do clean and grease it weekly but that's pretty minimal preventive maintenance. Basically all I want to say is Super T products are made to last. I wouldn't be surprised to be using my precise many years from now. Thank you for making such a quality product.