Does the lithium battery get memory like the NiCad batteries did?

There's no "memory effect" with lithium-ion batteries. Shallow discharge is actually better. What's probably best is that you avoid deep discharge. NiCads had problems with crystalline formation when they weren't fully depleted before they were recharged.

https://batteryuniversity.com/article/memory-myth-or-fact

@y_p_w is correct. Avoid leaving the battery with 0% charge for any extended period of time as that can permanently damage the battery and may cause problems with being able to power on the Apple laptop or even begin charging again.

If you leave a laptop connected to the charger all the time, then you need to exercise the battery once in a while. If you are running macOS 10.15.x+ (fully patched) and allow the new macOS battery health management system to operate, then macOS will exercise the battery automatically. Here is an Apple article regarding the new battery health management system introduced with one of the update patches to macOS 10.15.x:

About battery health management in Mac laptops - Apple Support

Other than these two edge cases, just use the laptop with a Lithium-ion battery how you wish.

y_p_w Said:

“The ‘memory effect’ was believed to be a reduction in usable charge range if a NiCad battery was recharged before being fully depleted.”

———-

Ah.

🙄I see now.🙄

I miscomprehended the word “memory” for the acronym “RAM”.

jrmunns Said:

"Does the lithium battery get memory like the NiCad batteries did?"

-------

Please clarify your post.

Memory is not consumed by a battery.

TheLittles wrote:

Memory is not consumed by a battery.

The "memory effect" was believed to be a reduction in usable charge range if a NiCad battery was recharged before being fully depleted.