[stetrain]

Need? Fairly rarely. Not having to watch the battery percent tick down like a clock is nice though.

It charges when docked to my monitor at my desk, and I basically never have to worry about running low in any normal situation.

I can be in meetings all morning, plug it in over lunch, and be in meetings all afternoon without issue.

When working at home I can use it on the couch, or the patio, and when I'm done put it back in the bag for tomorrow without running to the charger.

Do I need it? No. I also don't need a nice keyboard, or a good monitor, or an ergonomic desk setup.