The SLIM battery pairs best with any  or 510 threaded cart!
With a 400 mAh battery with three different power settings [Low (2.8v), Medium (3.4v), High (4.0v)] the SLIM battery allows you to pick the setting thats right for you! With a double tap Pre- Heat function and a micro USB charger this is the perfect discreet on the go battery for you! 

MSRP (Blue, Red, Black, Purple, Green,): $14.99

MSRP (Rainbow, Gold, Onyx, and Chrome): $15.99