Used married pairs. Especially in a mech.So, I bought a geekvape mech pro , and I asked the guy at the shop if I can mix my kind of used 25r with a new VTC5a , and he said yeah , no problem...
Soooo, do I pull the trigger, or I'm I holding a hand grenade ?
I never vape below 0.1 , I think I'm safeas long as you understand that performance and safety will be based on the WEAKEST battery...... Your safe to that degree....
It is safer and better in all areas of performance to use matched married sets of batteries.
.1 ohm?? Safe depends on the condition of your batteries more than brand and age.I never vape below 0.1 , I think I'm safe