Upgrade Your CT1.

CT1 To Fatboy Jr. Upgrade Kit comes with one Fatboy Battery, and one Fatboy Jr. Trim Ring, and one CT1 Fatboy Charge Adapter that will allow you to convert your existing CT1 cartridges and atomizers to be used as a Fatboy Jr. Kit which will provide approximately four times the battery life of the CT1 battery.

Charging.

The included charge adapter will allow you to charge the Fatboy battery with the CT1 chargers.