That does seem like a rather misleading name but probably coincidental, they probably were aiming for Lion the animal, because it's powerful, rawr!
I've never seen a lithium ion battery pack in such a form factor, and you can see the cell wall markings in the plastic showing that there are 6 compartments which is typical of a 12v lead acid battery. The calcium part is a clue too, lot of lead acid batteries will also have calcium as part of the plate material.
Mind you this is not stuff an average joe would really think to look for.