I have heard of people disassembling laptop battery packs which are apparently made of multiple 18650 cells, which are a super common standardized part that can be sourced very affordably. Then they simply replace the cells and keep the original battery enclosure and charging circuitry.
However, Chromebooks tend to be built for planned obsolescence, so it may very well be a one of a kind part
Surely the other orks would beat it back into line for not being orky enough