iPhone XS 99% Max Capacity [MERGED]

[HEK]

Some interesting points made in this thread. One thing I want to ask is does fast charging harm your battery?

I’m using the Smart Battery Case for my XR and I use the 18W USB-C charger to fast charge both the phone and case at the same time.

Does fast charging really degrade battery health or is that a myth?

You are fine. The charge circuits inside the phone use what the phone needs at any given time. Fast charging discontinues as you go above 80%, reducing to an intermittent trickle charge at 100%.

Apple engineers have designed the charging system to be user idiot proof. Charge as you need it, when you need it. On or off just keep the phone from getting too hot. Like sitting on dash of car in sun. Heat WILL damage your batteries.