One of the smallest 18350 and 18650 battery mods in the world with all the features of a big one.
BUTTON
Silver plated steel spring Nickel-plated brass contactor (anti-oxidation)
Lockable Encapsulated (anti inadvertent activation) Brass (better conductivity)
Mechanical engraving by diamond point
510 connector:
Solid stainless steel
hybrid type (without central stud)