I've gone through old well-answered questions about how to prevent a Mac battery lifespan (Does a low power charger help Macbook's battery, Limiting macbook (usb c) charge level…, Apple recommendations, etc.), and understood that:
- It's best to stay between 20 % and 80 % (for all lithium-ion batteries)
- It's not a good idea to use a too-low power adapter (drains the battery)
- Fast charging is not great
- Some recommend using AlDente (or just let macOS manage it)
Something I still cannot figure out is if it's a good idea to use a power adapter that is not super powerful to charge slower when the Mac is going to stay wired for several days.
For example, I have a 140W power adapter sold with a MacBook Pro 2021 16' M1 Pro, wired most of the time. When I use it outside I'm happy that the power adapter charges it to 100 % very fast, but when I'm back home and know it'll stay here for several days, I wonder if it might be a good idea to plug it onto a lower power adapter like the 96W or even the 67W (and leave it to charge and stay at 80-100 % for days on it).