Makita XGT 4 Ah Li-Ion Battery, 40 V (BL4040-2)

XGT 4 Ah Li-Ion BatteryBattery charge level with 4 bright green LED indicators to clearly see the charge levelReaches full charge in 45 minutes or less with Makita's DC40RA 40V Max XGT Rapid ChargerXGT batteries feature an advanced design impact-resistant outer case and shock-absorbing shell and strengthened battery terminals/railsWaterproof, triple-layer structure and terminal walls protect against cell failure due to water or dustDigital communication within XGT actively protects against overload, over-discharge and overheating