I'll pipe in again aluminium-ion batteries, Uni of QLD sent out prototypes of the coin batteries mid December of last year. They expect to have pouch pack formats released shortly.
"Coin cell testing to date has demonstrated that the GMG 2032 type G+AI Battery coin cell prototypes are fully rechargeable in several seconds, retain capacity for several thousand charge and discharge cycles, are non-flammable, and are relatively non-toxic and almost fully recyclable. These characteristics compare favourably against typical rechargeable Lithium-Ion 2032 type coin cells which take 3-6 hours to recharge, are toxic and can be quite harmful if ingested, are difficult to recycle, are flammable under certain conditions, and degrade more rapidly in performance."
For a full history and plan forward -
https://graphenemg.com/energy-storag...m-ion-battery/
The pilot plant has some good interest in India/Japan so the scaling already has funding if they keep ticking the boxes...
Suitable power packs could be available in as little as late this year early next and the characteristics compare is in two different worlds.
*In theory if they charge in a few seconds instead of 3-6hrs, you could just turn on the car and recharge your battery packs within a minute from the alternator and run 1000's hours of battery time for a few 100mm's of petrol at the end of the day.