If that's really true - they used a battery that is no longer in production, a design flaw if there ever was one, it's time to get creative. That battery had a voltage, a current
draw, and contacts. Another battery will do the same job, even if it won't fit, requires that you solder some leads, and that you wrap it in electrical
tape. For $750, Yes Never Again Simrad, but not Never Again Your Autopilot
. Time for Illigitmati Non Caborundum or whatever General Stillwell's horrid Latin said. Don't let them spoil your day. Beat them at their own game
. You'll feel bunches better, and your autopilot will still have a remote.