Brand new - coming as per photos without original box. 

Built for STANLEY FATMAX V20 18V power tools such as drills, drivers, sanders, nail guns, angle grinders, lights, multi tools and outdoor equipment. This 1 battery can be used across the entire STANLEY FATMAX V20 range.

This V20 Lithium-ion battery is ready whenever you are and wherever the job takes you, with an integral battery state of charge indicator for convenient monitoring of battery charge levels. The 18V STANLEY FATMAX V20 Cordless System batteries can be interchanged across your V20 power tools, using new and improved battery technology for longer runtime and power to get the job done.

The higher the amp hour (Ah) the longer the battery will last before it needs to be recharged.

Compatible with STANLEY FATMAX V20 range

Fade free 18V 4Ah Lithium-Ion battery

Improved battery technology, no memory effect and minimal self-discharge

Integral battery state of charge indicator for convenient monitoring of battery charge levels

The 4Ah battery will give you twice the runtime of the equivalent 2Ah battery