Lastest update August 30, 2022
Flip Ultra Review
The Flip Ultra is a great option for anyone looking for an upgraded 510 battery over the “pen”-shaped options. Its discreet design, compatibility with most 510 thread carts, 650mAh battery and puff counter make it convenient to use. It uses an on-demand vaping system that lets you start vaping immediately after popping the cart out, and automatically shuts off when you return it back into its place. As O2VAPE’s flagship vape pen, this design is exclusive to the brand.