Current electric cars and hybrids still all have 12V lead acid batteries in them (Teslas, Leafs, Priuses etc). These are typically used to drive the lights, win

Current electric cars and hybrids still all have 12V lead acid batteries in them (Teslas, Leafs, Priuses etc). These are typically used to drive the lights, windscreen wipers etc but also to bootstrap the charging process. I think in some states it's required by law, and although this is probably an artifact of history (you must be able to run your hazards even if you're out of petrol etc) it still means that cars will all have such batteries for the foreseeable future. I would seriously doubt the market viability being five years. Car manufactures like homogeneous models where possible - so you'd expect to see batteries until every model in the range was a hybrid. It's otherwise additional complexity, and I'd imagine a right pain to get restarted when flat.