BACK TO BATTERY
  1. Slang. an artillery term. A gun, after it fires, is said to go out of battery, which is to say, it recoils. Then after it’s fired it’s supposed to go back to battery, which is sitting the way you see them in photographs. They use the term in slang to indicate somebody who is now fixed up. So this guy will be all right for something or, what he has had will now be over. I could give you a purer definition, and say it is a completed case for that level, but the C/S doesn’t normally think like that. (7204C07 SO II)



Technical Dictionary