I recently fired up my old PS2 after 10+ years of it being off and unpowered.
I was surprised to see that it still knew the correct time and date. ie it knew it was January 11th, 2016. The actual time of day was only off by half an hour too.
What kind of technology does the PS2 use to be able to accurately keep track of time, in an unpowered state for over 10 years?
Computer motherboards use to have a replaceable CMOS battery like this.
It's literally a fucking watch battery.
You should not be amazed by this.
My watch batteries barely last 3. That's a nice battery they got there, if it's just a watch battery. I could see other types of batteries lasting that long, but a normal watch battery seems kinda off.
Gameboy cartridges have one of those too, my pokemon red has lasted more than 15 years without the battery giving out.
Surprisingly the one inside my newer pokemon silver cartridge died and lost all my progress.
No it's literally like many watch batteries. Watches consume significantly more power, and watches consume shit.
Think of what a watch does, then subtract the most power consuming part: the display.
Meanwhile, in Dreamcast land, after a whopping one month of not powering it on...