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
Amazon.com: 2PACK 3.0Ah 18V/20Vmax PCC680L Li-ion Battery and PCC692L Charger Replace for Porter Cable 18V/20V Battery Compatible with Porter Cable Battery PCC680L, PCC681L, PCC682L, PCC685L, PCC685LP, PCC699L : Tools & Home Improvement