It's not that they were deep-cycling the cells before. Discharging lithium cells to 0 volts is very bad for them; the cars definitely restrict the cells from be

It's not that they were deep-cycling the cells before. Discharging lithium cells to 0 volts is very bad for them; the cars definitely restrict the cells from being discharged below a certain point. Rather, the potential for danger due to this rare, hard-to-detect manufacturing flaw is great enough that Chevy is asking Bolt owners to self-impose even tighter restrictions on how low the batteries will be discharged.