Beware of those felt pads for the battery posts. I recently got a new Duralast Gold battery. They gave me felt pads with the battery, to help avoid corrosion.
I thought I got the battery post clamps tight enough with those pads on. I had a couple of glitches riding down the highway the other day. (Radio reset, lost Sirius, lost station presets... but then got it all back few mins later.)
I opened the hood when I got home, and sure enough, I could wiggle just slightly the positive post.... damn!
I took those stupid pads off, cleaned and tightend the hell out of those clamps, then sprayed them with that red protectant sold at parts stores, and the problem is solved.
My assessment of what happened is: The posts taper towards the top. The felt pads kept my clamps away from the bottom of the post. (This is the first vehicle I've owned with a spring steel clamp, instead of the older lead style clamp.) This 'clamp lift' kept me from getting a tight grip on the post.
So, I don't know if others have had a similar experience. Or, perhaps I'll save someone the bother I had with it. Thinking back on it now, I don't know why I even tried those felt pads... I have never had a corrosion problem that wasn't solved by a simple cleaning, and the red anti-corrosion spray.
So, Lift your Jeep if you like, but DONT LIFT YOUR BATTERY CABLE CLAMPS!