Amazon.com: Battery Converter for Milwaukee M18 18V Battery to Black & Decker 20Volt LBXR20 LB20 Battery, to Porter-Cable 20V Battery PCC685L PCC681L Battery, Work with Black & Decker and Porter Cable 20V
New Milwaukee 48-11-1820 M18 RED LITHIUM Li-Ion CP 2.0 Ah Compact Battery 670045308630 | eBay