for equipment stacked in a shed, don't you have to move the others blocking it anyways?
I disconnect/remove batteries from equipment not in use for extended times or use house chargers on otherwise healthy batteries during off season.
bad batteries get replaced immediately. roughly 5 years is typical, just factor it in with other maintenance costs and fuel. life is much to short to waste time like that. operating equipment that depends on jump starting is extremely frustrating. it's much better on your sanity to just replace bad batteries.
for stubborn or cold natured equipment, most jumpers don't regenerate like a running machine with a charging system. another frustration I don't need if I'm trying to get something started that doesn't want to cooperate. at least with a steady supply of cranking juice, I can focus on the real problem, not running back and forth for something to crank the engine I'm working on.
as far as parking, yah I get it, we have three buildings arranged similar to this. invariably something in the back needs to come out, but whatever else is blocking it has to be started anyways for it to move. implements, planters, trailers, etc. don't get parked in front of trucks and tractors.
I can use a set of cables a dozen times or an hour straight if needed and they never have to be charged or replaced, and they're just as easy to connect to a battery as cables off of a portable tool. I always have something or somethings running to get here so that's never an issue.
like I said, there may be a place for them in town where people only own one car or whatever, but I can't justify the expense, storage, and handling hassle when I've got a couple dozen perfectly good batteries to jump from already.
and lastly, cables always work, always. the last thing I need is another thing to break, fail, wear out, run down, etc. I'm up to my shoulders in that already.
I'm just simple like that but everyone has their own way of doing business. good luck!
works every time