Dewalt 18v xr = 20v xr max, WATCH this before you buy – Mellif Tools
Sierra Circ Flexvolt Advantage Dewalt 7 1/4 20/60v Dcs573b
DEWALT 20V MAX* XR Cordless Combo Kit (6-Tool) with (2) Ah Batteries and Charger (DCK648D2) - Amazon.com
DEWALT FLEXVOLT 60-Volt Li-Ion MAX Cordless 4-1/2-6 in. Small Angle Grinder (Tool-Only) w/FLEXVOLT 20-V/60-V MAX Battery 9Ah DCG418BWDCB609 - The Home Depot
DeWalt FlexVolt 60V Max Circular Saw Review | PTR
Dewalt DCS579T2 54v XR Flexvolt Circular Saw 190mm + 1.5M Guide Rail + 2 x 6ah | DIY at B&Q