اريد حلا كفاءه بطاريه ايفون 11 قلت ٢٪؜ خلال شهر هل هذا طبيعي

Battery health declines as you use and charge your phone. This is normal

If it's only declined 2% in the 7 months you've owned your iPhone 11, that is pretty good actually.

My recommendations would be that you plug in your phone when you go to bed and leave it plugged in all night.

Make sure that Settings > Battery > Battery Health, Optimized Battery Charging switch is turned ON.

When using your phone, try not to let it go below ~20% charge.

iPhone Battery and Performance - Apple Support

لا تقلق ، هذا طبيعي. البطاريات ، مثل جميع المواد الاستهلاكية ، تتدهور مع تقدم العمر.

---Translation---

Don't worry, this is normal. Batteries, like all consumables, deteriorate with age.