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Devices with internal batteries basically have embedded expiration dates.

Standard AAA or AA can be rechargeable so you don’t need to keep buying more. I’d suggest buying like a 100 pack or something, they’re not expensive.

The ideal would be rechargeable AA battery support with a built-in USB-C that would natively support charging said AA battery.

AA batteries have lots of different chemistries and they require different chargers or can't be charged at all.

You can also get a USB charger for them which is very convenient.

At this point so many battery packs use the 2 double-a batteries side-by-side, I wish they just sold those as a usb-c rechargeable cartridge, that would make a lot of sense

Check this out

https://addison-electronique.com/en/aaa-li-poly-rechargeable...

Has technology gone too far

I’ve seen mice with rechargeable AA batteries. Plugging in the mouse recharged the battery (the mouse is basically a battery charger). But you can also quickly swap them in and out if the cable is inconvenient. Best of both worlds.

Allow me to recommend low self-discharge NiMH batteries (Eneloop brand is excellent) and a good charger made for that chemistry.