Why does Battery drain even when MacBook Pro is shut down- eg I had 98 % battery at 2 am and shut MacBook Pro- And at 11 am next morning it was 68 % why does this draining happen ?

Hi Ashok1947!

It sounds like you’re concerned about the battery of your MacBook Pro, and we're happy to help. You can read some relevant information here:

About Mac notebook batteries

Cheers!

If you need to retain the battery charge you should shutdown rather than put the MBP to sleep.

Ashok1947 wrote:

Thanks, So in Energy saver preferences should the power nap option be checked (selected ) or not ?

That depends greatly on your requirements.

A sleeping Mac will wake up for some functions: How Power Nap works on your Mac - Apple Support

A Mac that is shut down will not awaken for these tasks, and it’ll need to reboot to start working again.

Use Activity Monitor to see which apps are using power. You can either quit that app, or find an alternative that uses less power. Activity Monitor is in Applications > Utilities.

There can be other potential issues, too.

And the Mac can charge external USB devices while asleep, a transfer of power which will drain Mac battery power.

It’s also possible your Mac has issues, or your battery is in need of replacement: Determine battery cycle count for Mac notebooks - Apple Support

Try an SMC reset: How to reset the SMC of your Mac - Apple Support

In the absence of hardware issues with the Mac or with the battery, these are all trade-offs, and the decisions here are yours.

Is the Mac shut down, or is it sleeping?

If sleeping, there are various features such as Power Nap which can consume power.