Stanley FATMAX SB204 20V Lithium Ion Battery 4.0Ah

FEATURES & BENEFITS
With improved battery technology, no memory effect, and minimal self-discharge, the V20 lithium-ion battery pack is ready to go to work whenever you are and wherever the job takes you – and it will last longer too.
Integral battery state of charge indicator for convenient monitoring of battery charge levels.
Part of the new 18V STANLEY® FATMAX® V20 Cordless System – power all your V20 tools with a common new & improved 18V lithium-ion battery to let you power through work with ease.