[NTLK] 2x00 battery rebuild

[Grant Hutchinson]

> On Jan 1, 2025, at 2:30 PM, NewtonTalk via NewtonTalk <newtontalk at newtontalk.net> wrote:
> 
>> So, there's only a single temperature-related component in those packs?
> 
> Nope. The yellow Polyswitch protects against battery failure when the pack
> is accidently shorted out. This switch is self-resetting, i. e. when the
> short is removed and the Polyswitch has cooled off, things will work hunky
> dory as before. The thermistor is the little component with the white wires.
> It tells the Newton that instead of the battery holder a rechargeable pack
> is installed. It also changes its resistance when the cells get warmer
> during the charge cycle, which tells the Newton when to stop charging. The
> pack will work fine (but be no longer protected against shorts) when you
> replace the Polyswitch with a piece of wire, but it will not work if you
> leave out the thermistor.

Thank you, Frank.

This explanation is pretty much exactly what I had thought in the first place.

Somewhere along the way I ended up muddling things in the brain.

Carry on!

g.