system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 : Why is it that smartphone batteries are said to deteriorate if used while charging, but the same is not true for laptop batteries and laptops are encouraged to be plugged in most of the time?
gpt
I have not heard this specific phrase often, but this mainly has to do with heat generation.

Smartphones, as they are so small, develop quite some heat during charging ánd during use. Because of the compact formfactor the heat from using the phone will also enter the battery, unlike in laptops where this component is usually thermally quite well isolated.

Modern batteries (lithium-ion) do not like heat a lot, and will deteriorate if heated often/long/much.

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A lot of phones even work on lower clockspeed while charging, and are therefore slower while charging, to prevent too much heat build-up.