I remember, and I’m gen z. And some higher end laptops had two battery slots so you can hot swap the batteries without turning it off.
Those were the days. Everyone talks about how smartphones nowadays get people addicted to instant gratification and convenience, but IMO the ability to swap out the battery when it died was a level of instant convenience we had decades ago that modern devices are severely lacking. Having to tether your phone to a battery bank while on the go is nowhere near as good as just popping the back cover and replacing the battery.
Galaxy S3 had swappable battery, micro sd, headphone jack, and a freaking IR blaster.
Same with the S4. I still use mine, it’s on it’s third battery now and is running LineageOS.
Same with my old Samsung Note. In addition, you could buy a bulky aftermarket battery that had way more capacity.
Yup, that’s what I did with mine… forget the capacity but it would go 3 or 4 days on a charge. Even came with a thicker back panel on the phone because the original wouldn’t fit.