Calor gas
The solution to the battery problem lies in the calor gas model.
The battery design must be standardised. You rent a battery from a supplier.
Batteries are available at outlets throughout the country - let's call them 'garages' .
When your battery get low, you visit a garage and swap your battery for a fully-charged one and go on your way [with minimal delay and hands that don't smell of diesel].
The garage-man puts the battery you left behind on charge. If it shows up as at its end of life, it gets replaced by the leasing company.
It works for caravanners...
William