Battery health

Your phone is 2% from perfect. Battery Health will continually decline with every full cycle charge of the battery. This is what batteries do. ALL BATTERIES. You are worrying about something that is normal and expected. So stop worrying about it.

See this link about maximizing the performance of your battery, but again, Battery Health will keep declining, because it's normal for it to decline --> Batteries - Maximizing Performance - Apple

There is nothing wrong with your battery. Most users experience a 1-2 percent loss in battery health each month.

athirah97 Said:

"Battery health: Hi i just want to ask. Why my iphone 11 battery health loss 2% in just one day. I already use my iphone for only a month. I didnt expect that the battery health will loss more and faster than i expected :'("

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Nothing can be Known:

Unfortunately, there is no way to know why a battery has drained. So, no worries there. It drains as it drains, making it a normal occurrence.

Completely normal. There is nothing to be concerned with unless your battery health drops below 80 percent. Batteries are consumable and degrade through use, environment, composition, etc.