Thank you, I have often wondered if it would be p[ossible to change out the heavy lead acid battery for a suitable lion battery obvously with the same charging voltage as the lead acid as provided by the alternator...any thoughts?

Morgans 1934 MX, 1947 Series 1, 1956 +4 TR4, 2000 +4 T16
Triumph Herald 1969 13/60
Morris 1970