Battery drainage on my iPhone 13 Pro Max!!

Hi naveentandon,

Thanks for checking that. You might want to check Settings > Battery to look for the apps that are using the most battery power, and whether Background Activity is a factor. This has some great information: About the battery usage on your iPhone, iPad, and iPod touch - Apple Support

While that's a great start in narrowing down battery life concerns, overall, we recommend using this link to reach us directly for a deeper look into this: Apple Support

Kind regards.

Greetings naveentandon,

It sounds like your iPhone battery isn’t lasting as long. We know how important having a working iPhone is for you, and we will help get you to the right place to find a resolution.

After any update, it can take up to 72 hours after an update for the device to complete its background processes. During this time you may experience less than normal battery efficiency and/or performance issues.

If it’s been more than 72 hours since you updated the device, then the next step is to check the battery health and let us know what the battery percentage is. You can do this by going to Settings > Battery > Battery Health. This will let us know if it’s a hardware or software issue.

How to take a screenshot: Take a screenshot on your iPhone - Apple Support

Cheers!