Upgrade Path from Dewalt 18V Cordless Tools?

A reader’s Dewalt 18V tools and batteries are starting to fail, and so he is looking for advice on where to go from here. Any ideas?

Mellif for dewalt 18V 20V MAX Battery Tire Inflator Air Compressor Cor – Mellif Tools

Farm Update and: Upgrade old 18v Dewalt cordless tool: 20v lithium ion adapter kit review

18V Cordless Cut Out Tool Kit

DEWALT ATOMIC 20-Volt MAX Lithium-Ion Cordless Combo Kit (2-Tool) with (2) 2.0Ah Batteries, Charger and Bag DCK225D2 - The Home Depot

20V MAX* Brushless Cordless Compact Drill/Driver Kit

20V MAX* XR® Brushless Cordless 1/2 in. Drill/Driver Kit

DEWALT 20V MAX Power Tool Combo Kit, Cordless Power Tool Set, 5- Tool (DCK590L2),Yellow : Everything Else

DeWALT 18V XR Li-Ion range - Our fastest-growing system. Get more done with 140+ products in the 18V XR range. All tools come with upgraded features

DeWALT 18V 5 Piece Brushless Kit

CONVERTING your old Dewalt drill to “lithium ion” (18 V to 20 V)…

Does this sound right? Cordless Drill cogging when letting off the trigger. : r/Tools

DCD771 in the cordless drill combo kit has a high speed transmission that delivers two speeds (0-450 & 1,500 rpm) for a range of fastening and

DEWALT 20V MAX Power Tool Combo Kit, 10-Tool Cordless Power Tool Set with 2 Batteries and Charger (DCK1020D2)

DEWALT 20V MAX Cordless Reciprocating Saw and 18V to 20V MAX Lithium-Ion Battery Adapter Kit (2 Pack) DCS380BW2203C - The Home Depot

DEWALT 12 Volt Cordless Drill/Driver Kit DC742 DW9072 DW9118