Now you are going to tell me "but they are Lithium Polymer" batteries?
A lithium polymer battery, or more correctly lithium-ion polymer battery (abbreviated variously as LiPo, LIP, Li-poly and others), is a rechargeable battery of lithium-ion technology in a pouch format. Unlike cylindrical and prismatic cells, LiPos come in a soft package or pouch, which makes them lighter but also less rigid.
No, I am perfectly aware of the full name for a Lipo
I was merely pointing out that the part you elected to put on this forum was irrelevant to P4 packs, to avoid any confusion...
Useful as the app is though I'd always recommend that people check with their airline as well since these are the minimum guidelines and the airlines are entitled to be more restrictive if they wish...