There are two different types of batteries, one is a direct inhale. The direct inhale batteries are two in a package and they have a USB charger. Take it screw it on and then you can take a drag from a direct inhale. When the battery runs out you can the other one on and charge the flat one. It takes 30 minutes to charge.
The push button battery is slightly stronger and lasts longer. It screws on as well. You hit the button 5x and it turns on. It then blinks to let you know it is on. You do need to turn it off bu hitting it 5x again.
There is a central pole that W Vapes designed and it centrally heats the oil. This heats it more thoroughly and quickly.
I hope this helps!