Hello guys. If you have old bosch drill driver like mine, you can build a new battery for your old drill driver. My bosch is 15 year's old and still working.Hope you enjoy this video and thanks for your support.
Parts:
Battery case PSR 1440: https://www.aliexpress.com/item/32813...
Li ion battery 3300mah 30A VTC7: https://www.aliexpress.com/item/32888...
4S 40A Li-ion Battery BMS: https://www.aliexpress.com/item/32852...
4S Type-C charger: https://www.aliexpress.com/item/10050...
Mini Spot Welder: https://www.aliexpress.com/item/40011...