The DOTECO Minis Built-in 650mAh grade A battery the max output wattage is up to 18W.

Battery capacity: 650mAh
Charging Port: USB Cable
Buttonless Airflow Activated
Mini MOD w/ 650mAh
Side window to showing the cartridge
Automatic battery shutdown
2x 510 Thread connectors for the short and long type of vape cartridges
Compatible w most 510 vape cartridges

Each set contain:
1pc Minis Battery
1pc Mirco USB Cable
1pc User Manual