Replaces Black Decker 20V Max Lithium Battery Lbxr20 Lb20 Lbx20 With Upgraded ?Brand New?Replace for Black and decker 20v Lithium-ion Battery | 20 Volts Max |Capacity: 3600mAh each. ?Compatible?The LBXR20 20v MAX lithium ion battery Compatible with all BLACK DECKER 20v cordless tools, replacement battery replace Black Decker LBXR20 LBXR20-OPE LB20 LBX20 LBX4020 LB2X4020-OPE. ?Upgrade Version? Made of premium battery cells, can be charged freely without memory effect. Black Decker battery lbxr20 offers a longer lifespan and retains its charge 5x longer than similar 18-volt NiCad batteries, holds a charge for up to 500 days. ?Lighter Weight? Easy to install and remove, compact and lighter which prevents fatigue from long hours of work. Built-in integrated microchip prevents overcharging and other malfunction to prolong battery life. ?Customer Service?This battery has a 30-day return and exchange and a 12-month warranty from the date of purchase. We will also provide you with 24-hour comprehensive customer service.