On 26/04/2021 07:08, williamwright wrote:
On 23/04/2021 19:11, Fredxx wrote:

The last Transit I owned had two lead acid batteries of equal size.
During cranking and running they were connected together. At other
times one was isolated from any gizzmos and so zero drain.

My 2009 Transit has that arrangement. It works well. The two batteries
are squeezed in under the driver's seat.

Squeezed is an understatement! LOL