Battery drain on my new ipad pro m4 and pencil pro

The Notes App is often reported as being a battery hog when using the Apple Pencil - in particular when using the Scribble handwriting recognition features. Disabling Scribble in iPad settings can significantly improve battery endurance.

Settings > Apple Pencil > Scribble - set to OFF

If your iPad is not operating as expected, try a forced-restart - as this will often clear an isolated software issue:

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

If the problem persists after performing the restart, it may be necessary to reset your iPad settings. While this reset will not cause any loss of data, as a precaution, it is always wise to ensure that you have a current iCloud or iTunes backup before performing the reset:

How to back up your iPhone, iPad, and iPod touch - Apple Support

When you are happy to proceed, you can perform the reset from iPad settings:

Settings > General > Transfer or Reset iPad > Reset > Reset All Settings

If the problem still doesn’t clear, the next step is to reset the iPad to factory settings:

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Otherwise, you would be best advised to seek assistance directly from Apple Support. You can contact the Support Team using the Support link at top-right or bottom-left of this page. Alternatively and perhaps easier, you can initiate and manage your support cases using the excellent Apple Support App. If not already installed on your iPad, the App can be downloaded from the App Store:

https://apps.apple.com/app/apple-support/id1130498044

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to test and assess your iPad - and you can explore your available options:

Genius Bar Reservation and Apple Support Options - Apple

Massive-04 wrote:

Resetting doesn’t help, i’ve seen many others user face this issue too and their feedback was taking ipad to store isn’t also helpful. When will apple solve this issue

Apple can't solve an issue that they haven't assessed - hence the recommendation to have your iPad tested by an Apple technician who may be able to fix the problem.

Perhaps understand the Apple Support Community is a user-to-user technical forum. Contributors here are all end-users, just like you. Other than the site Moderators, Apple neither monitor nor participate here. As such, if you hope to reach Apple through these forums, you will be disappointed.

While knowledgeable contributors here can often provide immediate solutions, we're not magicians; sometimes you need to seek assistance from someone who can hands-on test and assess your device.

I do have one additional thought...

If you are experiencing heating issues when using your Pencil in Notes, ensure that you have turned-off Zoom in your Accessibility settings - as many have reported that this helps to remedy unexpected heating:

Settings > Accessibility > [Vision] Zoom > Zoom - set to OFF

Have you checked if there are any background applications running at the time of use?