bogi on Nostr: Usually they're just 2 or 4 standard 12v 8a batteries out together and you can buy ...

Usually they're just 2 or 4 standard 12v 8a batteries out together and you can buy those yourself and take apart the previous battery back and redo the new ones from the taken apart ones. Might not be as pretty but it'll be cheaper than the official premade battery pack.