In general, a slow charge is better for the battery. Fast-charging can be done with minimal harm to the battery if certain conditions are met. For more details see the link below. (Link discusses in terms of Li-ion, not sure if Apple has switched to LiPo but we can assume they behave similarly to Li-ion).
Alle charge (Score:2)
But is slow charge not still better for the battery?
Re:Alle charge (Score:2)
Re: (Score:3)
In general, a slow charge is better for the battery. Fast-charging can be done with minimal harm to the battery if certain conditions are met. For more details see the link below. (Link discusses in terms of Li-ion, not sure if Apple has switched to LiPo but we can assume they behave similarly to Li-ion).
https://batteryuniversity.com/index.php/learn/article/ultra_fast_chargers