Battery Rebuild & Refresh Vintage Cordless Impact Wrench | Makita 6900D

I’m really happy when I first see it, but after looking inside it’s an old model cordless impact wrench by MAKITA. There is also a charger in the box. The only one problem is the dead battery. I try to revive the battery, but the charger doesn’t charge it. Finally, I rebuild this battery by replacing new battery cells. MAKITA CORDLESS IMPACT WRENCH - 6900D Motor DC No load speed(.) - In high speed (Punching :2000-time/min.) 1,500/min - In low speed (Punching : 1500-time/min.) 1,300/min Square drive dimension (mm) 12.7 mm Max. fastening torque (kg-cm) 1,000 kg-cm (When the M12 high force bolt is being fastened for 8-sec.) Bolts which can be used for fastening - Normal bolts (F4T) M8-M14 - High force bolt (F8T-F11T) M8-M10 Weight (including a battery)(kg) I hope you find this video useful and enjoy it! Furthermore, I am happy to receive feedback, suggestions to improve myself. !!! I’m sorry for the mistake if