Hey there,
My Maxima Battery has power and jumping it didn't do anything. Basically, the car won't turn over. It seems after tinkering with it that the terminal connected to the battery is loose or broken somehow. I do not believe it is the battery or starter or the solenoid.
The cable connected to the positive battery look very strange. It seems like a unique part for this vehicle. If I wiggle that part of the connection it seems to reignite the power to the car. But apparently not enough to actually jump the car. After wiggling it, the automatic seat belt will work but then the power disappears very soon after.
I can also post a photo of my battery if that would help.
