[NTLK] MP 2100 rechargeable battery specs

[Melvin Chia]

I am not referring to the thermistor or thermocouple, which is a pair of wires jointed at their ends. 
The poly switch, on the other hand, (Frank refers to it as a temperature switch), is a connector that completes the series connection between the two rows of batteries in the package. (The red rectangle in Frank’s schematic on his website).

To answer your question, the thermistor/thermocouple is connected between terminals A&B and the negative end of the battery. I have mine wired exactly as Frank’s instruction and I have no issues. I trust that he has taken all the precautions to ensure the information he provided is correct.

Curious if anyone has the electrical schematic of the charging/disharging circuit in the 2X00 MessagePads.

Melvin

> On Apr 8, 2024, at 16:57, Michael Sheflin <sheflinm at gmail.com> wrote:
> 
> Are you referring to the thermistor?  If so, there should be a thread on
> this from January.  I ended up buying this -
> https://www.mouser.com/ProductDetail/Bourns/MF-LS180?qs=aMbtsk9EOIaKOmmSNtsPMw%3D%3D
> 
> My rebuild is stuck in limbo because I also can't figure out what is
> supposed to form the contact - is that the thermistor itself?  It's not
> 100% clear to me, either from the disassembly or from Frank's tutorial what
> is supposed to actually be the contact if not the thermistor itself.  I
> also could have been a bit less sloppy.
> 
> 
>> On Mon, Apr 8, 2024 at 4:05 PM Melvin Chia <meloosa110 at gmail.com> wrote:
>> 
>> Oops, I guess I won’t spot weld them to the batteries next time.
>> :(
>> 
>> Melvin C
>> 
>>>> On Apr 8, 2024, at 11:35, Dave Shevett <shevett at pobox.com> wrote:
>>> 
>>> My understanding is that temperature switch is very difficult to source
>> - I
>>> have a project to put in new cells in my 2100 as well, and I have the
>>> batteries, but most of the tutorial say "WHATEVER YOU DO, DONT DAMAGE THE
>>> TEMP SENSOR, YOU CANT GET REPLACEMENTS"
>>> 
>>> So curious if that's just rumor :)
>>> 
>>>> On Mon, Apr 8, 2024 at 11:21 AM Melvin Chia <meloosa110 at gmail.com>
>> wrote:
>> 
>>>> ………
>>>> Melvin C
>>>> ----------------------------------------------------------------------
>>>> 
>>>> http://newtontalk.net
>>>> http://twitter.com/newtontalk
>>> 
>>> 
>>> 
>>> --
>>> Dave Shevett
>>> shevett at pobox.com
>>> ----------------------------------------------------------------------
>>> 
>>> http://newtontalk.net
>>> http://twitter.com/newtontalk
>> ----------------------------------------------------------------------
>> 
>> http://newtontalk.net
>> http://twitter.com/newtontalk
> ----------------------------------------------------------------------
> 
> http://newtontalk.net
> http://twitter.com/newtontalk