Rokin battery is the best I love having it close and it is like having a security blanket helps not looking for a battery it's already there. I love how it works
Rokin Rage 510 Thread Oil Vape Cartridge Battery
If you want a powerful hit with proper discretion look NO FURTHER!!!!!!
Rokin Rage 510 Cartridge Battery
This works with all 510 Cartridges top and bottom draw.
I like that it shuts itself off after a short period of time.
It won't accidentally go off in your pocket.