Upgrading an Old Hitachi Drill Battery: Lithium 18650 & USB-C Mod

Breathing new life into a dead Hitachi power tool! In this video, I tear down an old NiCd drill battery, rebuild it using high-capacity 18650 lithium cells, and install a custom USB Type-C fast-charging port. No more bulky proprietary chargers—just plug and play. 🛠️ Main Parts Used in this Project: • High Drain 18650 Lithium-Ion Cells • 3S/4S BMS (Battery Management System) Board • USB Type-C 15W 3S Lithium Battery Charging Boost Module If you enjoy tech DIYs, hardware modding, and satisfying ASMR builds, hit that Subscribe button! #DIY #BatteryUpgrade #HitachiDrill #TechMod #18650