The M3 Battery by CCell is an ultra slim, inhalation activated battery that pairs perfectly with the TH2 Atomizer or M6T Atomizer! The M3 is incredibly easy to use with no buttons or adjustments to make, just screw on almost any 510 threaded oil cartridge and inhale! A bottom light will illuminate while the heater is activated, and you only need to inhale for 2-4 seconds at a time to produce a surprisingly large and super smooth draw. The M3 is very slim and super pocket-friendly, but a full cartridge and battery can last for many, many draws! Battery comes charged.