Things I couldn’t find elsewhere

Atari Mega STE battery replacement

whiskey - Mar 4, 2018

that black Tadiran thing is just a shell that you can open, replace the original battery, close and velcro back in :) There is a pic somewhere in the atari-forum.

Edit - Sorry, I missed your note on the high shipping costs to Europe.

Thank you both for the intel. In addition, the Tadiran TL5242W is still readily available at many electronics outlets, around $10 US to $20 US.