No… They sell the batteries just as replacement packs for their production boards.
They’re local friends of mine and I’ve been testing some of their stuff by integrating it into my custom builds. The PCB power rail is one of the internal components on their production board, not for sale individually.
For example: My HoytRodz build which uses their Pocket Rocket motors, ZooBomb 97s, and their machined pulleys: HoytRodz - Pocket Rocket 180kv | SurfRodz 200mm RKP | Unity FOCBOX | ZooBomb 97s | 12S LiPo
I’m using these batteries to build out a flight-safe board for my work travels.