I think now is the best time to buy Starlink mini 1. I keep mine on the roof as a backup line most of the time and take it with me when i travel. This new version is basically limited to the mobile use only. At least I see no way of mounting it on a roof safely.

There are plenty of adapters for drill batteries.

I've got the OG mini on my truck camper.

I don't see anything here that would meaningfully improve it assuming your truck has a reasonable power situation when it's not running. Mine runs off house batteries in the camper. And for whatever the price difference is from $150 you can buy a much more versatile power bank for camping.

For truck camping it feels like the main upgrade to this version, the built in battery, is unnecessary because you can power it off the vehicle when you need to or have a separate little battery pack power the Mini.