Mechanical Mods are exactly that, meaning that they have no wires, no chip and no digital safety features. Pressing the button completes the circuit between the battery and your coils. Mechanical Mods or 'Mechs' can produce a lot of power therefore should always be used with Rebuildable Dripping Atomizers (RDA's).
THESE PRODUCTS ARE FOR ADVANCED USERS ONLY AND MUST ONLY BE USED IF YOU HAVE AN IN DEPTH KNOWLEDGE OF OHMS LAW, COIL BUILDING AND YOU KNOW THE CAPABILITIES OF YOUR BATTERY.
SOME MECH'S USE A HYBRID TOP CAP SO THERE IS NO PIN BETWEEN YOUR ATOMIZER AND YOUR BATTERY, ENSURE THAT YOUR RDA USES A PROTRUDING 510 PIN.
ALWAYS USE BATTERIES WITH THEIR OUTER WRAP COMPLETELY INTACT AS THAT WILL AUTO-FIRE YOUR DEVICE AND CAN CAUSE BATTERY VENTING, OR IN SOME CASES THERMAL RUNAWAY, WHERE YOUR BATTERIES CAN EXPLODE AND POTENTIALLY REACH TEMPERATURES OF UP TO 250C AND SPEW HOT BATTERY ACID CAUSING SERIOUS INJURY AND 3rd DEGREE BURNS.