Enegitech 4.0Ah 20V MAX Replacement Battery for Black&Decker LBXR20 LBXR20-OPE LB20 LBX20 LBX4020 LB2X4020-OPE Black and Decker Lithium Battery Compatible with all 20 volt Max BLACK+DECKER cordless devices Snap-on latch and quick-release lever enable quick swap-outs Highest quality standards,integrated microchip prevents overcharging and lengthens battery life Charging at any time will have no effect on the battery, holds a charge for up to 500 days 100% QC of this battery, 30 Days Money Back and 1 Year Warranty