I have totally DEAD, DO TO MY STUPIDITY, 12v GELL cELL BATTERY. Is there a
reasonable way to at least partially restore it? ( I do not believe "zapping" sealed battery with 40V DC is an option. )

 

What is the battery voltage? I've had some success recovering flooded lead acid and SLA's using a Harbor Freight battery maintainer. If the battery is too far gone, nothing will recover it.

 

IF it was run down to flat dead only once, IT MIGHT RECOVER after a long slow trickle recharge. By LONG I mean two or more DAYS at 5 to10 milliamps.