Specifications :
The DeWalt DCB189-XJ 18V 4.0Ah XR lithium-ion battery is an efficient and light source that is compatible with all DeWalt 18V XR series power tools, as well as the DeWalt XR charger.
Same weight as the 3.0Ah battery.
It uses 21 mm high capacity cells and provides 72Wh of power.
Offers improved uptime and optimized power.
With energy meter to monitor the charge level.
It has no self-discharge.
Weight only 540gr.