Lenovo C100 Series Li-ion Battery with 8 Cell Li-ion Battery (40Y8313)

you hello today I'll transform this old cordless power drill nickel-cadmium battery into little battery by using 18 650 s Sony VDC 5 sells first of all it is need to open battery housing this one is made without any screws so it is need to grab a small screwdriver and try to split this case into parts at joint line cut off main battery connector for future use to monitor the state of battery I used lipo battery voltage tester with low voltage buzzer alarm this one is very popular in EDC world you will show total voltage of battery pack and all separate voltages of cells connected in series i'll made the few modifications to get better fit inside the battery case first remove the plastic cover mark negative and positive terminals the solder and solder buzzers the opposite board side to get flash filled with battery case the dremel made a whole discrete voltage meter at left side drilled