Idea,

Connect a battery cable to the + side of the circuit and run it down along
the front of the firewall just right of the nose wheel well or otehr
convenient underneath location.  Install a female connector obtained from an
arc welding cable. Secure it in place with adel clamps and sleeve it with
shrink to insulate same from firewall. Obtain it from a welder supply store.
Carry the male end in your console glove box.  You now can plug in the plug
and attach a battery charger, jumper cables or trickle charger as I do to
keep the battery topped off while in the hanger.  About 400 ma should do the
trick. Remove plug before flying.  I connect the trickle to the plug and
lower clamp on one exhaust extension.

Bob Smiley
N94JR