Need a thinkpad

Hey, my major is electronic and computer engineering. I need a thinkpad with a good long-lasting battery, and window’s 11 preferably.

My budget is $400 - $700

Also, it needs to have at least 500GB of storage, and has the option to upgrade the storage.(not a necessity)

The cpu needs to be okay, l don’t need to run future triple AAA games. I want the laptop to do all of this well: watch entertainment, use Lightroom, photoshop, Davinci Resolve, and FL studio.

The laptop just needs to fit in a backpack. So not too big. I don’t care about touchscreen or anything like that.