On Fri, 23 Oct 2020 16:14:41 +0100, John Rumm
wrote:

I've just been given a Makita DTW190 impact wrench and mating BL1830B
battery but no charger. I was given it without charger because the
person believes I have a compatible charger (and other battery) but I
can't find it atm.

So, in the meantime I charged the battery using my GP charger and it
now show 4 out of 4 charge LEDs ... and I'm going to 3D print a
charging clip off Thingiverse to make that process more
straightforward.

The multipin connector on the battery looks like it could be a balance
connector of some sort but I couldn't see any voltages on it from a
quick look with the DMM so have to assume the BMS in there looks after
the cell voltage balance itself (not the charger)?

Is there a basic / slow charger out there that's cheap, in case I
can't find the other one (and assuming it's compatible if I do)?

Cheers, T i m