Thanks for posting in the Apple Support Communities ashwin259,
The following support article provides information about the battery in your AirPods Max you should find helpful: How to charge your AirPods Max and learn about battery life
In particular, the following applies specifically:
* If you set your AirPods Max down and leave them stationary for 5 minutes, they go into a low power mode to preserve battery charge. After 72 stationary hours out of the Smart Case, your AirPods Max go into a lower power mode that turns off Bluetooth and Find My to preserve battery charge further.
* If you put your AirPods Max in the Smart Case when you're not using them, they go into a low power mode immediately to preserve battery charge. After 18 hours in the Smart Case, your AirPods Max go into an ultralow power mode that turns off Bluetooth and Find My and maximizes battery life.
Cheers!