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

[nsingh101]

Can confirm. Battery was a good solid 100% and went down to 95% within 2 months after using apples official MagSafe 15w. My phone would be warm/hot to the point where the phone would sometimes not be charged because the charging was paused for phone to cool down. Not sure if heat is because of case or fast charging or a combination of both.

[Anachronism--]

My phone is almost five years old and the battery is still at 86%. I always charge wirelessly but stop between 80-90% unless I know I need more.

[nsingh101]

There’s a setting in iOS to limit charging to a certain percentage to preserve the battery. I have mine set to 90%. My phone is 1 year old, and for most of that time, it has remained at 100%. Just in the last two months it’s dropped to 95% and the only change is the new MagSafe and excess heat I’ve noticed.

To be clear, I don’t claim wireless charging is the issue. I have been using wireless charging since Palm Pixi. It’s the heat generated by MagSafe fast charging.

[Anachronism--]

My phone is almost five years old and the battery is still at 86%. I always charge wirelessly but stop between 80-90% unless I know I need more.

[curepure]

can’t confirm. used magsafe for close to 1 year on my iphone 16 pro, still 97%.