I asked if you are stupid. The crystalline structure of the batteries break and the batteries become useless. Stationary batteries absolutely need replaced as they are subject to the same charge, drain, recharge cycle of any battery. Standard cars don’t use cobalt but fuel refining does. About 1 pound for a few million gallons where a standard lithium ion battery cathode is about a third cobalt which isn’t much until upscaled to millions of units. Cobalt is recyclable in both cases. There is misinformation on both sides as both have agendas and billions of dollars invested.