When you get old a feeble you have to improvise. My camper battery was shot, in most cases you don't need one as I am always hooked up to power from my truck or at the campground.
It still bugged me that it was so weak so I decided to change it out. Now, with bad body parts I can no longer pick up a heavy battery up so I had to improvise a way to get it out of its awkward compartment.
I rigged up my deer dragamatic 2000 (my deer mover invention) to loop the mule tape over a gas line in the compartment, hooked to the battery and pulled it out of the battery box with my cordless drill. Next I put a ramp under the battery and slid it out of the compartment on the ramp.
I used a hand truck and 4 wheeler ramp to get it into the bed of my truck.
I reversed the procedure and put the new battery back in the compartment. I never picked up the battery during this swap out.