Fixing Dead Ni‑Cad Batteries: $5 Adapter Runs Tools on 20V MAX Li-ion

Old Ni‑Cad batteries don’t have to send your tools to the landfill. In this video, I test a simple $5 adapter that lets worn‑out Ni‑Cad tools run on modern DeWalt‑style 20V MAX packs. This is the beginning of a three‑part rescue mission to bring these “dead” tools back to life. Chapters 00:00 Dead Ni-Cad Batteries, AGAIN 00:26 Old Tools, New Idea 03:33 The $5 Adapter That Changes Everything 04:57 Wiring the Leads 08:40 Fit-up Check 12:19 Shaking Up the Old Battery 13:01 What This Means for Old Ni‑Cad Tools 13:32 Soldering to Ensure Connections 15:08 Some Points of Interest 16:19 Power‑Up Quick Demo Ni‑Cad tools were built tough, but their battery packs… not so much. When the packs die, the tools usually get tossed. But with a $5 adapter and a little wiring, you can give those old tools a second life using modern 20V MAX batteries that are easy to find and cheap to replace. In Part 1, I walk through the first steps of the conversion: testing the adapter, checking fitment, wiring temporary leads, and proving that these old tools still have life left in them. This is where the whole project starts — and where the idea becomes real. Watch Part 2: Wiring the adapter & first spin -    • Papa Jim’s Ni‑Cad Jailbreak – Wiring the A...   Watch Part 3: Full stress test + final results -    • Did a $5 DeWalt 20V MAX Fix Save My Aldi N...   Full 3-part Playlist -    • Cordless Tool Resurrection - Saving Old Ni...