Battery keeps dropping after every restart

Please go through the following links.

• iPhone Battery and Performance - Apple Support (IN)

Protect & Prolong the life of your iPhone's Battery: Batteries - Maximising Performance - Apple (IN)

Try some of these options too.

1. Avoid Screen Mirroring
2. Put on Low Power Mode
3. Put Auto-Lock on (1 min):- with the Low power mode it will be 30 Sec
4. Disable Push notifications for apps you do not use often
5. Keep your iPhone Facedown to prevent notifications to light up the screen
6. Enable Auto-Brightness:- Settings > General > Accessibility > Display Accommodations > Auto-Brightness [Enable]
7. When possible, manually lower the brightness from Control Center
8. If you want to watch continuous Videos/Movies. Stream it on TV or a Monitor
9. Don't force close apps; Apps that are not on the frontend screen are paused by the system to save energy. Apps require more energy to re-launch. Apps that are open in the background use large memory is a myth and quitting them is counterproductive
10. Location services may please be allowed only while using the app. Avoid the "Always" option wherever available
11. Set your iPhone to fetch email & Calendar data from the internet less frequently
12. Turning off Background App Refresh 
13. Charge before it drops below 20-30%
14. Periodically Check the Battery Health (Settings > Battery > Battery Health)

If your iPhone 14 Pro battery is dropping by 3-5% with every restart, there are a few things you can try to fix the issue:

1. Check for software updates: Make sure your iPhone is running the latest version of iOS, as software updates often include bug fixes and improvements that can help resolve battery issues.
2. Reset all settings: Go to Settings > General > Reset > Reset All Settings. This will reset all of your settings to their default values, which can help resolve any configuration issues that may be causing the battery drain.
3. Check for app updates: Make sure all of your apps are up to date, as app updates often include bug fixes and improvements that can help resolve battery issues.
4. Check battery usage: Go to Settings > Battery and check the battery usage of your apps. If you notice any apps that are using an unusually high amount of battery, try closing them or uninstalling them.
5. Calibrate your battery: Allow your iPhone to completely discharge and then fully charge it to 100% without any interruptions. This can help calibrate your battery and improve its performance.

If none of these solutions help, it may be a hardware issue, and you should contact Apple Support or visit an Apple Store to get further assistance.

Same problem I am facing

My phone doesn’t have any hardware issue as they diagonsed it but still it falls but I will try ur battery 0-100. Trick should it would switch off till 100 ?

the battery is over 3 years old. Apple recommends to re-place battery after %80 below battery health. if the battery is below %80 seek to replace iPhone battery at a Genius Apple store front.

500 Cycles per battery & drain battery once and fully charge to optimize battery health and safety. battery can explode if opened. or cause injury to skin and lungs.