The battery health of my iPhone 11 Pro has come down to 91% from 93%

A drop from 93% to 91% in battery health over just a week or so on your iPhone 11 Pro isn’t something to be overly concerned about. Battery health can fluctuate slightly due to various factors like charging habits, usage patterns, and temperature.

In general, a small decrease in battery health over time is normal. To help maintain battery health:

1. Avoid Extreme Temperatures: Keep your phone out of very hot or cold environments.

2. Manage Charging Habits: Try not to let your battery drop to 0% frequently or charge it to 100% all the time. Instead, keep it between 20% and 80%.

3. Use Optimized Battery Charging: This feature, available in iOS, learns your charging routine and slows the rate of charging when it reaches 80% to reduce battery aging.

You can also make changes to your iPhone settings. Here's the link : Batteries - Maximising Performance - Apple (IN)

If you notice a rapid decline in battery health or any other issues, it might be worth contacting Apple Support or visiting an Apple Store for a diagnostic. But for now, a small decrease in battery health is generally considered normal.

Hello~ Your battery health will contract to decline and I would not be overly concerned about it until it gets down around 80%. I am however surprised that you have an iPhone 11 and the battery health is at 91%. Have you had that battery changed? If so by whom?

~Katana-San~

Apple only displays whole numbers on the battery percentages and any tenths are always rounded down.

Your battery might have really been at 93.1% and the decline went down to 91.9%. So, there may have only been a drop of 1.2%, but Battery Health will display that as a drop from 93% to 91%.....making it look like the battery went down 2% when it really didn't.

That’s true.