[Lukesportsman]

Braille makes several "lines" of batteries including armored ones. I'm using their regular line in my cars. Li-Fe in the motorcycles which are impressively light. Li-Fe are quite expensive at car sizes so will hold off until technology proves itself and price comes down. If you've never picked up a Li-Fe battery, its like picking up CF or Mg for the first time, as it just doesn't register is "right" since it is lighter than you brain processed it being.

Li-Fe DO REQUIRE special chargers, their regular line can be trickle charged as usual. The Braille style battery advantages are not fluids, no orientation limitations, more amps per size do to reduced internal resistance, forgiving of discharge duty cycles and just plane quality of manufacturing.

I've never thought to use Al foil in all my years of fabricating. Always can pick up easy ideas on here.