Don't even think about building something like that yourself in your home. If one of the cells gets damaged it can set of a chain reaction which will burn down

Don't even think about building something like that yourself in your home. If one of the cells gets damaged it can set of a chain reaction which will burn down everything around it. A fire like this is quite hard to extinguish, similar to the teslas that burn down sometimes ( https://www.youtube.com/watch?v=vYKTTCNUV3o https://www.youtube.com/watch?v=vYKTTCNUV3o ). Using lithium iron phosphate batteries might be a safer alternative.