Why are you focusing on lead starter batteries; surely EV batteries are more relevant?
Approximately 100 million starter batteries are fitted by OEMs every year. This is the largest energy storage market of all.
ICE vehicles will be continue to be made in significant numbers for the next 10 years, including hybrid vehicles.
There is also an urgent need for lightweight starter batteries to accommodate a growing array of on-board auxiliary systems and connected services. Ultimate Battery Company Duophasic technology can typically save 12-15kg (26-33lbs) of vehicle weight, which significantly impacts on CO2 reduction.
OEMs assume a nominal £11 per kg of weight saved on a vehicle.
In addition, most EVs also require a 12V auxillary SLI battery for the electrical system and traction battery management. This is not expected to change for the foreseeable future.