This is good stuff, thank you Feedback.loop.

I've gone through the process of trying to get my lowly 199 black & white meter
up and running as I've not used it in about a year. We know the routine.
Dead battery, plug in and let is charge for a few hours and then get start it up.
I checked things then turned off the power while it charged over night
thinking I'd follow Feedback.loop and use a LIon battery pack that I'll
have to make.
Bad news is I think this battery pack died. I tried to power up again and it wouldn't.
This is my second battery pack and they all do the same, they die on you and refuse
to start up again.
I know I'll need to add the 120K resistor, no problem.
QUESTION(S):
I can source six of the batteries to make the batterypack, no problem.
My question is to build the pyramid I'm not sure if I can solder leads to
the battery ends with out damaging them. Is there a method?
I assume that manufactured packs come from the factory with spot welded
leads and hook ups. Then I learned that I have to use the parallel series
protection board...you mentioned you'd share the gerbers.
I'm not very experienced doing SMD, I have some practice boards that I
destroy all the time. I've got no problems doing tube gear and older
test equipment as they have discreet components. I don't have a
hot air attachment for my rework station, which I think is needed
as I'm good at melting the SMD parts.
So, what is the best way to proceed?
Spike