convert a black & decker cordless drill battery to lithium ion - high drain battery

My 2007 Black and Decker batteries are out of power now and have bought a new hilti battery so it's time to try it out.
I did some research on lithium ion on the internet and saw a lot of other conversions on instructures.
First, please measure which contact is-
It's easy to open the package, some torx screws and voila.
Pay attention to safety, wear gloves, remove the pin, remove the large pin on the left and one of the other two pins.
You only need 2 pins.
I 've welded about 10 cm of the wires on it, but it's up to you.
I found the holder from eBay, just search for it.
To keep 3 and 2 batteries, the battery is more difficult and you need good ones.
I collected the old Mutian battery by mistake.
There are always some good cells in it.
To get 18 v, use 5 of them and use a good li-ion charger.
Monitor them, after 3 days they should be above 4 v if not they are not bad.
If you're looking for a new battery, look for a good battery with high consumption.
Maeda uses 15A.
On my multimeter, they are about 2100 mah welded wires to string into 5 groups and connect the contacts.
The 3 s bracket is difficult to get in, just push it.
2 s is on top.
Please make sure everything is OK, measured and-
Make sure the contacts are in the right place.
Happy or not, end this case and test your walkthrough?
It's hard to find good protection.
Lithium ions need protection because it is empty to discharge them, they will be damaged and they will explode.
Lithium ion charger should also be used to charge, do not use ni-cd or ni-mh charger.
Never use the original charger from Black Decker!
I am charging the package using the Imax B6 mini charger with crocodile clips.
There is not much space left on the Protection Board, so I should replace the package without a bracket.
I will update this when my pcb/BMS is at home.
I ordered a 20 a high leak BMS with a higher peak.
BMS also charges and balances the packaging.
I don't know if BMS is working properly, but I will let you know.
I bought a protective board with a discharge speed of 20 a and I am not sure about the discharge speed of the battery, it is Sony SE us18. 0v cellsI that found some information, another website said, their rated discharge is 20.
Therefore, it may be better to find a battery with a rated voltage of 20 a for protection only.
I made a video: As you can see, with full force, the drill hasn't stopped so far, but I can't stop it with my hands.
Maybe if it gets stuck while drilling holes, big holes or something, I want to see what happens.
So the instructions have not been completed yet.
In addition, the battery in the BMS and the bracket is not suitable for the battery box.
I have to make the battery without a bracket and have to weld the wire to the battery to make it fit.
Will continue. . . .
BMS is not small, it can hold 18650 supports.
I decided to lose the stand and put the battery where there is no stand.
I packed it with electronic tape and welded the nickel welding tape with flux on it.
Maybe it's better to weld it on it, here are some guidance on how to make a welder with an old microwave.
But this is a big job for me, welding work, I used S39 (
Not old acid but new acid)
And a gas soldering iron.
First weld a drop on the battery with a flux, Then preheat the nickel strip a little, hold it with pliers, then push it to the battery with an iron until the solder melts.
I fixed the BMS with double sided tape and I fixed the small nut with tape.
Interestingly, my charger says a resistance of 282 to the resistance of the resistance hm and the original battery is over 999. . . .
The project is completed, the battery is working properly, the charging is normal, and the blower and drill bit are working properly!