Fixing a Dead Milwaukee 12AH Battery - Did It Work?

In this detailed tutorial, join Doctor Lefthandthread as we restore a Milwaukee M18 12Ah battery to its former glory. This battery was not charging, with the charger indicating a fault through intermittent flashing green and red lights. Upon inspection, I discovered the battery was only showing 14.5V at the top terminals, signaling an internal issue.
Follow along as I perform a comprehensive diagnosis and repair, including a step-by-step guide on testing individual cell banks and replacing defective cells. Using donor cells from a Parkside 8Ah battery, I successfully bring the Milwaukee battery back to life.
Repair Overview:
Initial Issue: Milwaukee M18 12Ah battery not charging, with charger showing flashing green and red lights.
Diagnosis: Battery showing 14.5V at the terminals; defective cell bank identified.
Solution: Replacing the defective cells with donor cells from a Parkside 8Ah battery.
Step-by-Step Process:
Assessment:
Diagnosing the issue by checking the battery voltage and interpreting charger signals.
Disassembly:
Opening the battery casing to access internal components.
Testing Cell Banks:
Performing individual cell bank tests to identify the defective bank.
Cell Replacement:
Using donor cells from a Parkside 8Ah battery containing 4000mAh 21700 cells.
Ensuring the replacement cells have a similar voltage (3.6V) to the remaining Milwaukee cells.
Reassembly and Testing:
Reassembling the battery and conducting a final test to confirm successful repair.
Safety Disclaimer:
This video is for entertainment and educational purposes only. Battery repairs involve risks and should be carried out with caution. Doctor Lefthandthread Media does not assume any responsibility for injury or damage resulting from attempting these repairs. Always follow safety guidelines and consider professional assistance if unsure
Milwaukee M18 battery repair
12Ah battery not charging
Milwaukee battery restoration
DIY battery repair
Replacing defective battery cells
Milwaukee charger flashing green and red
Power tool battery fix
Battery cell replacement guide
Doctor Lefthandthread repairs
Parkside 8Ah donor cells
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Join me in this successful repair journey and learn how to diagnose and fix your own Milwaukee M18 12Ah battery. Don't forget to like, comment, and subscribe for more repair tutorials