"While most airlines do not have a firmly defined maximum number of batteries under 100 Wh that can be brought aboard, we'd suggest travelling with no more than 4-5 LiGo's per person in order to avoid extra scrutiny. We have had customers travel by air with as many as 12 LiGo modules on them, but we wouldn't recommend that as a matter of course."
People traveling with folding bikes and LiGos: https://www.bikefriday.com/folding-bikes/the-only-electric-b...
This comment[1] reports the article battery as 160 watt hours, so 2x 99 Wh might be an upgrade.
One use case I pictured was last leg after airport arrival when traveling minimalist and budget. As a transportation alternative/supplement to mitigate last-miles time/$/hassle cost.