MisterEd said:
PCs have been been using the CR2032 non-rechargeable battery for decades now. It has the advantage of being easily found for purchase. If you need one you can just run down to Walmart to buy one.

My Raspberry Pi 5 does have a rechargeable RTC battery. If I need another one I will have to order another one online and wait a week to get it. The Raspberry Pi doesn't need the battery to save any settings. Normally the Raspberry Pi goes online to set its internal clock. It uses the battery to keep the clock running and set even when the Raspberry Pin does not go online.

Attachment 410589

Raspberry Pi - RTC Battery for Pi 5 - SC1163: This rechargeable lithium battery is designed to be used with Raspberry Pi 5 to power the onboard real-time clock (RTC) whenever mains power is disconnected.
Well a lot of more recent laptops do not use disposable batteries any more. The CMOS battery is rechargeable and cannot be replaced. Bummer if battery dies I guess