my battery is draining so fast
day by day battery draining very fast in a month 5% battery is lost
iPhone 13 Pro Max, iOS 16
Question marked as
When did you purchase your phone?
Batteries degrade over time with usage due to chemical aging, that's just how they work.
You can expect about a 1% drop per month with average use on an iPhone.
This is an approximation, that is why it may be plus or minus a few percent on a month to month basis.
Apple recommends replacing it when it reaches 80%. To check your battery health, go to Settings > Battery > Battery Health.
iPhone Battery Replacement.
iPhone Battery Repair & Replacement - Apple Support
About Lithium Ion Batteries
iPhone battery and performance - Apple Support (IN)
Here are some tips on maximizing battery life.
Batteries - Maximizing Performance - Apple