The battery is great, it’s small and easy to work.
I've bought all my supplies from SESSION. Recently they released their C1 carts and I scooped one. I have to say, for the viscosity of my homemade oil(little less viscous than honey), this is hands down the best cartridge. Very high vape quality, can taste the terpenes very well, enormous vape clouds. The C1 cartridge is the go to for high viscosity oils, hands down.