Battery Health

It is perfectly normal for Battery Health to decline at an average rate of about 1% a month. That's an average. Some months, it might not decline at all, and then drop 2% the following month.

Plan to replace the battery when the Maximum Capacity is down to 80%.

Most of the users who answer questions on this support forum connect their phones to the power adapter and leave it connected all night, every night. That is the single best....and easiest....way to preserve the life of your battery.

Personally, we will get 4+ years of service from the battery in the iPhone 11s here by using the method above. Your results may vary.

Bonus....you start every day with a fully charged battery.

The "charger" is in the phone. It automatically regulates the voltage. The phone will charge fairly quickly to 80% and then charge very slowly to 100%. When the battery reaches 100%, the charger in the phone automatically stops.

It is impossible to overcharge the phone, even if you leave the power adapter connected to the phone for days.

It is very normal for your battery health to decline by 1%. I recommend that you charge your phone to 80%. When you need to replace your phone battery is when the health reaches 80%. When your battery needs to be replaced, schedule a repair for a new battery from Apple. Hope this helps. Tip: Don’t charge your phone overnight.

No. It's normal for the battery to lose 1% a month.

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charing overnight is safe!

Hi! No, it's perfectly normal for it to happen. But you can try battery saving tips to slow down the battery decline.