RATS! I forgot to unplug my Kenwood TM-D700 in the Jeep before I left. The radio draws almost nothing when it's off, but the Garmin "Hockey Puck" GPS receiver I have connected to it draws about 65mA, more than enough to drain a battery after 22 days away!
We first tried using one of those jumper boxes with a big GelCell battery in it, but IT was dead, so one of the logistics guys brought over a 400 Amp battery charger/booster, and a Honda Eu2000i generator.
We fired up the generator, connected everything, let it sit for a few minutes, and my Hemi rumbled to life.
It's connected to my trickle charger now, and I hope I didn't damage the battery. Ignition/Starting batteries are NOT meant to have a small, constant load connected to them, and the plates can get sulphated if you do that to them.
Hopefully the trickle charge will clean things up.
And my dogs went absolutely bonkers when I got home. I thoguh they were going to crash through the gate when I pulled in the driveway and got out of the Jeep!