How to upgrade 8.4V Makita Cordless Drill Battery from Nicd to Lithium Battery. The battery pack is 7.2V ~ 8.4V 2200 mAh.
Restoration Elements
2 18650 Lithium Battery 2200 mAh 3.7V
1 Liion Battery Charger 8.4V
2S20A BMS Battery Protective Board for Liion With Balance
Nickel Strip
PVC heat
Backing Soda
Soap powder
kixx grease 2
1 power jack female 5.5 mm x 2.5 mm

Restoration Tools
Battery Spot Welder
Heat gun
12V Makita Cordless Drill
Other tools

I hope you find something useful & enjoy this video!
I am happy to receive your feedback, advice, suggestions to improve myself.
!!! I apologize for the mistake if I have made in this restoration !!!
**I still keep some parts, I want to save the world's environment**
Thank you so much for Likes & Comments