Just shipping the product can be an issue if you use FedEx or similar. I don't think they allow >100wh, and even under this is a pain. Understandably, because they already have had a few crashes likely caused by battery fire.

US airlines might choose to approve 160 Wh batteries: https://www.faa.gov/hazmat/packsafe/resources/media/Airline_...

Never had any problems traveling with it, even to the (supposedly super restrictive) US.

no way tsa checks

The one time they do, you will either be abandoning your $3000 laptop or missing your $3000 flight. Better to follow the rules. Not because the rules are intrinsically good, but because not following them can be a big waste of time.

is saline solution exempt from tsa fluid limitations or is it bottles that say saline solution

Ask a high school dropout!