Battery packs are not designed to be serviced, I would imagine that a Semi has like 4-6 packs and each one has to be fully replaced. The same thing goes for the

Battery packs are not designed to be serviced, I would imagine that a Semi has like 4-6 packs and each one has to be fully replaced. The same thing goes for the engine, you just remove the whole engine assembly and put in a new one if one breaks.