Your question has been answered, but I'd like to offer this as a tip/trick for any vaper who ever reads this
thread:
A long time ago, I got in the habit of using noalox on my charger contacts when I noticed a couple of my chargers had aluminum terminals. I reapply maybe every three or four weeks... some ends up on my
batteries - therefore some ends up on my pin and spring. I never have to noalox my REOs (or other
mods I used to use, for that matter) and their contacts all look brand new after a quick wipe with an alcohol prep pad.
A little dab will do ya. The 5 oz bottle in my toolbox at work has been there for I don't know how many years and has been used for all sorts of electronics, automotive, and you-name-it applications where AC or DC has to get from here to there via two pieces of metal touching each other. There's a half ounce tube rolling around my desk here somewhere that's been with me at least a year... I probably have enough in those two containers to last me a couple of lifetimes.