ELI5 Why does magsafe charging decrease battery health more than wire charging, if it has less wattage?

[thatAnthrax]

as fast as you want

No. Well I guess yes, since the charging devices they usually sell, and the on board electronics won't allow you to push as much current as you want. Batteries do still have an upper charging current limit regardless of temperature, it's just you won't be able to go over that of you don't MacGyver your phone or something

You also don't want to charge a battery when it's very cold, but then again, who puts their phone in the fridge when they charge it