DeWalt 20V MAX Battery Rebuild – Step-by-Step Upgrade from 6Ah to 9.8Ah

DeWalt 20V MAX Battery Rebuild | From 6Ah to 9.8Ah Upgrade In this video, I show you how to rebuild and upgrade a DeWalt 20V MAX 6Ah power-tool battery step-by-step — from safely removing the old cells to spot-welding, balancing, testing, and final charging. What you’ll learn: • Safely disassembling your DeWalt 20V MAX battery pack • Removing old nickel strips and cells • Installing new 21700 cells with insulation rings • Spot-welding new pure nickel plates • Balancing and testing internal resistance (IR) • Verifying charge and final voltage ⸺ 🔋 Cells (available from RenewSpark) Molicel P50B 21700 – 5000mAh, 60A continuous: https://renewspark.com/products/molic... See all 21700 cells: https://renewspark.com/collections/21... ⸺ 🔧 Parts & Materials Nickel strips (10 mm × 0.2 mm): https://renewspark.com/products/0-2mm... Kapton tape: https://renewspark.com/products/polyi... Fish-paper insulation rings: https://renewspark.com/products/21700... ⸺ ⚡ Tools Used Spot welder: https://amzn.to/4neVzzh Soldering station: https://amzn.to/4ghKhIA Internal resistance tester (YR1035+): https://amzn.to/3JQG9Tw ⸺ ⚡ All rebuild parts and supplies available at https://renewspark.com?utm_source=you... Rebuild complete – upgraded from 6Ah to 9.8Ah. Tools I Use (Free App): 🔧 Build safer, cleaner battery packs with the RenewSpark Tools app — IR checker, pack designer, wire & nickel sizing, load calculator, and more. 📱 Download on the App Store: https://apps.apple.com/us/app/renewsp... Subscribe for more rebuild tutorials and DIY battery upgrades. 🔋 Disclaimer: Lithium-ion battery rebuilding can be dangerous if done incorrectly. This video is for educational purposes only. Attempt at your own risk and always follow proper safety precautions.