Battery Durarion in new MacBook

It depends on what you're doing. Processor intensive tasks (streaming video, doing anything in Chrome) will use the battery faster. My MBP can run all day doing light web browsing, email and documents but if I'm dialed into Zoom meetings for work it barely lasts 3 hours.

10 hours is a number achieved under ideal lab conditions with probably nothing running. I doubt you or anyone else will get 10 hours battery use under normal running conditions.

To repeat:

It depends on what you're doing.