[PaleMelanesian]

See, I've got the opposite problem here. Our hot summers kill batteries. I specifically chose the DieHard "south" variety for that reason. The plates inside are thicker and stronger, for longer life. Not as many will fit in the space, so the output capacity is compromised a bit. For me, that's exactly what I need. For you, the "north" variety would be better - more plates, but thinner, for higher output but less hot-weather tolerance.

Parking lights - I only do this when stopped at a light when there are street lights around.