DeWalt 20V MAX 5Ah Battery Rebuild | Step-by-Step Tutorial

Rebuilding a DeWalt 20V MAX 5Ah lithium-ion battery pack with brand new cells. In this video, I take you through the full rebuild process — from opening the case, removing old cells, spot welding new ones, and reassembling the pack. ⚡ What you’ll see in this video: • Safe teardown of the OEM battery case • Preparing and installing new 18650 cells • Spot welding nickel strips • Final test of the rebuilt battery ⸺ 🔋 Compatible Cells (available from RenewSpark) I used different cells in this build. These are compatible 18650 options you can use for the same rebuild — either one gives you the full 5.0Ah at 2P: BAK N18650COP – 2500mAh, high-drain: https://renewspark.com/products/bak-n... Samsung 25R – 2500mAh: https://renewspark.com/products/samsu... See all 18650 cells: https://renewspark.com/collections/18... ⸺ 🔧 Parts & Materials Pre-cut nickel strips (DeWalt 20V MAX 5Ah): https://renewspark.com/products/nicke... Pure nickel strips (0.2 × 10mm): https://renewspark.com/products/pure-... Fish-paper insulator rings: https://renewspark.com/products/18650... ⸺ ⚡ Tools Used Spot welder: https://amzn.to/4neVzzh Battery tester: https://amzn.to/4mVhw6c Soldering station: https://amzn.to/4ghKhIA Solder wire: https://amzn.to/3HL5jm3 Desoldering tool: https://amzn.to/46oi3s1 Desoldering wick: https://amzn.to/4gceNn3 Cut-resistant gloves: https://amzn.to/4nVFSgL ⸺ 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... If you’re interested in seeing any other rebuilds, let me know in the comments so I can make a video for it 🔋 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. 👉 Subscribe for more rebuilds:    / @renewsparkbatteries