This drill was abandoned in Japan, because its battery was dead. I just convert the battery from Nicad to Liion, it works very well.

Original Battery
12 cells of Nicd 1.2V
Voltage 12V ~ 13V
Capacity 1.2 Ah

New Battery
6 cells of Lithiumion 3.7v 3000mAh
Voltage 11.1V ~ 12.6V
Capacity 6Ah

Original Charger
Output voltage range 7.2V ~ 14.4V
Input 100V

New Charger
Output voltage only 12.6V
Input 100V/240V

BMS 3S20A is a battery management system for 12V battery pack
Lithiumion battery cell
Brand model: LG INR18650HG2
Standard capacity: 2800 3000mAh
Rated voltage: 3.6V
Charging voltage: 4.2±0.05V
Maximum continuous discharge current: 20A
Discharge cutoff voltage: 2.5V
Weight: Max.47.0g
Size: Max.18.2×65.2 mm
Charge and discharge times: 500 times

I hope you find this video useful and enjoy it!
I am happy to receive feedback, suggestions to improve myself.
!!! I'm sorry for the mistake if I did in this video !!!
** I still keep some parts, I want to help the world environment **
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