XGT® Battery, Lithium-Ion, 40 V, 4 ABattery charge level with 4 bright green L. E. D. indicators allows the user to clearly see charge level Reaches full charge in 45 minutes or less Enhanced cooling system is engineered to maximize battery life XGT batteries features an advanced design impact resistant outer case and shock absorbing inner liner engineered to protect the battery in harsh jobsite environments The digital communication within XGT optimizes performance to provide up to 2X