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

– Molicel P50b 21700 4.85 Ah: https://renewspark.com/products/molic...

Tools & Supplies Used 👇
– Nickel strips (10 mm × 0.2 mm): https://renewspark.com/products/0-2mm...
– Spot welder: https://amzn.to/4neVzzh
– Soldering station: https://amzn.to/4ghKhIA
– Kapton tape: https://renewspark.com/products/2-rol...
– Fish-paper insulation rings: https://renewspark.com/products/21700...
– Internal resistance tester (YR1035+): https://amzn.to/3JQG9Tw

⚡ All rebuild tools, parts, and safety supplies available at https://renewspark.com

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...

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⚡ Want your battery professionally upgraded?
We rebuild and upgrade power tool batteries, e-bike batteries, and custom lithium-ion packs.
Visit https://renewspark.com and use the contact link to email your battery model — I’ll send you a rebuild quote.