The 18V STANLEY FATMAX V20 2.0Ah Lithium-Ion Battery features improved battery technology, no memory effect and minimal self-discharge and is ready to go to work whenever you are and wherever the job takes you. Complete with an integral battery state of charge indicator for convenient monitoring of battery charge levels when working on tasks. The new 18V lithium-ion V20 battery pack is the centre of the V20 system and is fully compatible with V20 outdoor products as well as products in the V20 Power Tools range for even more flexibility. All sizes feature an integral battery state of charge indicator for convenient monitoring of battery charge levels. Power all your V20 tools with a common new and improved 18V lithium-ion battery so you can power through work with ease.