While this is a bit off topic it is about battery removal woes...
Going back a few years a friend of mine had a C4 vette as did I at the time. He asks me one Sunday to drop by and assist him with getting the battery out. The C4 battery was located on the driver side behind the wheel in that huge engine bay those cars had. Located right over the battery was the master cylinder and a few other goodies preventing easily lifting it out.
I arrive to find the brakes have been bled and he is starting to get the master cylinder off the firewall. I stopped him there, loosened the bolts in the wheel well (30 sec job)that held the small body panel with the gills in it that covered the battery allowing the battery to be slid out sideways.
His wife thought we were both nuts as we laughed our a$$es off for a good ten minutes
I went and picked up the new battery while he put his car back together.
Sorry couldn't find pics to help you see how simple it actually was versus the work he though he had to do