The DEWALT DCF850E2T XR Brushless Impact Driver is supplied with
2 x 18V 1.7Ah POWERSTACK™ Li-ion Batteries.
1 x Charger.
1 x TSTAK™ Kitbox.
POWERSTACK™ batteries deliver 50% more power* with a 25% smaller** footprint and work with all of the 18V XR tools you already have.
* Regarding 50% more power: vs DCB183 battery, not in application.
** Regarding 25% smaller pack and a more compact footprint: vs DCB183 battery.