today I learned that the Philips CD-i consoles have a clock battery which is permanently formed into the clock chip, meaning you have to *break open the chip enclosure* to replace it 😨 https://cdii.blogspot.com/2009/03/picture-guide-of-cd-i-battery-repair.html?m=1
@ticky This was ridiculously common in RTCs and NVRAMs of the 80s and 90s. The prevailing design was to just swap out the entire chip when the battery ran out. So ridiculous.
I'm actually really surprised that they're constructed in such a way that these mods are even possible!
@ticky It was pretty common in PC motherboards. https://en.wikipedia.org/wiki/Real-time_clock has a bunch of examples.