It's cool but 4.5 hours feels low for what you'd want. Between sometimes not fully charged, degradation, not wanting to fully deplete the battery your average comfortable use-time is going to be more like 2.5-3 hours. A burst of work but an entire half day of work is pushing it. It also competes with your phone hotspot, and is more of an advantage where you dont have cell coverage (more remote - where you are more sensitive to lower battery life because you cant recharge as easily).

Let me reiterate. I think this is actually awesome and I'm sure 4.5hrs is a big accomplishment. Starlink is awesome. I just think for any product you need to discount the stated battery life significantly.