Watch the anodizing video Giaco and I made here: https://youtu.be/rNjV6Jn1v_8
This is a PSA. You should never wear a ring while working with batteries. Especially LiPo / LiFe / Li-Ion batteries. If two terminals touch the ring you will burn your finger. Even 18650 batteries can toast your fingers. The severity of the damage can range from a hot ring to the ring getting burned stuck to your bone.
All that makes sense right? But is it really that bad? Lets connect a battery to a ring and stick it on a sausage.