In article , "BoborAnn"
wrote:

I opened it up and found two cells about 1.5 X a D cell tied in parallel so
it must be ea high current application. Tomorrow I'll put a couple of D
Cells in parallel and mount them in the original battery box

Bob-

That sounds about the size of an "F" cell. I would expect a modern
Alkaline D cell would have as much capacity as a carbon-zinc F cell.

Fred