Mode Zero

I received a multiplex 3030 for a very good price and before upgrading it to 2.4 Ghz , would like to replace the on board bias battery.
I believe the new battery needs to be installed in parallel before removing the existing one, to avoid a break in supply to the computer chip.
the existing battery is a MnO2- lithium - Sanyo CR2500(? number obscured) which has a bracket spot welded to the positive face, and with the connection to the -ve side of the case obscured.
I have read that soldering to these batteries is not good practice and I'm curious about the negative contact.
Has anyone here had any experience doing this?

Thanks
John

https://www.zier-net.de/mfg/technik/bat ... tterie.htm

You could try google translate.

And here the battery

https://www.google.com/search?q=varta+c ... nt=gws-wiz

KH

Not difficult to solder a couple of wires to the tracks and add an external battery and case such as a CR2032.
Tape up so nothing comes in contact with it and shove away in a corner somewhere.
Done it on the JR388 no worries.

Then cut the old battery out afterwards.

Thank you Kalle and Bluejets - that is exactly what I need Kalle.

That is also a possibility Bluejets.

I'm busy translating

This MPX 3030 is too good to throw away and as a MPX user for 30yrs - I couldn't do that anyway.

Cheers

John