Totally flat battery. Trickle charger has been on it for 72 hours and electronics still won't even turn on. Figure it's time to jump it. I've got another car in the garage I can do it with, but it's got a 480A battery and the 981 looks like a 780A battery. Anyone know if that's going to cut it before I go through the hassle of breaking out the jumper cables and going through the process?