The Rogue Shop’s Vape Battery Slim – discrete, compact battery with variable voltage option. This is designed with the flip fob function and made specifically to utilize oil cartridges. This is powered by an integrated 650mAh battery with the ability to regulate the power settings from 3.7V to 4.0V. It can be recharged with USB-C charging technology, the system is equipped with safety features such as over-charge protection, over-discharge protection, over-current protection, short circuit protection, and over-voltage protection.