The Medusa XL 510 Threaded Battery is the perfect ego device for your favorite concentrate cartridge, featuring a powerful 400mAh internal battery, a 510 threading, and variable voltage! It also features draw activation, a LED indicator light, and an advanced chipset that offers various protections.

Medusa - XL 510 Threaded Battery - 400mah - Black Features: 

 
Medusa - XL 510 Threaded Battery - 400mah - Black Includes:

(1) Medusa - XL 510 Threaded Battery - 400mah - Black