Looking at 401 options, but don't know much about em... Anyone know what threading it's compatible with? Trying to eliminate having 100s of adapters as well as trying to save you guys money
yep 401 is a 510 reversed, I connected a 510 battery to a 401 battery and the atty's together last night to see. (the atty's had a bit of a gap between)
So same threading, just different depth on post and well.
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