system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it better for Lithium-ion batteries to be charged after a partial discharge and not a full discharge, unlike the Nickel-based batteries, which had a memory-effect that caused them to hold less charge if they got charged repeatedly after being only partially discharged not fully discharged?

According to battery experts , It's always better to charge lithium-ion batteries every time you could, and It's not recommended to wait for a full-discharge and then do a full-charge, unlike the Nickel-based batteries, Why is that?
gpt
Lithium batteries will degrade if left in a low charge state. To get the capacity/run time out of a battery cell, manufacturers will let you push the device deep into the discharge state. But this comes at a cost of decreased lifetime.

Since lithium cells have no memory like NiCd, it's best to charge them promptly. Although long term storage of a lithium cell at full charge isn't healthy either, but not as quickly  degrading as discharged state. 

For longest life of a cell, discharging to 20% capacity and charging to 80% is generally preferred.