He was able to rescue the existing deep discharged battery in his car, but the steps would be roughly the same to replace a submodule (readily available from totals cars).
There are also people looking into replacing the individual prismatic cells (the 500e is built with 63AHr samsung SDI cells, and there are now 120AHr cells available in the same form factor) but so far the only success story is from an outfit in Europe building custom packs out of banks of cylindrical cells https://www.fiat500owners.com/threads/upgrading-battery-for-...
He was able to rescue the existing deep discharged battery in his car, but the steps would be roughly the same to replace a submodule (readily available from totals cars).
There are also people looking into replacing the individual prismatic cells (the 500e is built with 63AHr samsung SDI cells, and there are now 120AHr cells available in the same form factor) but so far the only success story is from an outfit in Europe building custom packs out of banks of cylindrical cells https://www.fiat500owners.com/threads/upgrading-battery-for-...