this post was submitted on 14 Oct 2025
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Okay, now I know why my Dreamcast keeps asking for the time and date every time I turn it on. Always wondered, but never checked because it worked regardless.
The battery is soldered in, but it's dead simple to desolder and replace with a proper battery holder so you can easily replace it down the road. Just make sure 6ou remember to use a rechargeable.
TIL rechargeable CR2032s exist, and also that their output voltage is higher than standard ones and apparently may run the risk of damaging circuits?
Rechargeable battery chemistry usually can't exactly match the voltage on the old ones. I've seen problems with all sorts of stuff by switching to rechargeable AAs. They typically have only 1.2v compared to 1.5v of a regular AA.
But the rechargeable coin battery mod for the Dreamcast is fine, I modded mine years ago and have had no issues.