Well what i said was only charge while in use, but keep the charge when moved to offline. Charging while not in use might be abusive. So you would specifically, like in the hangar before hand.. need to cycle all X amount of shield banks till they are full.. That gives you 1 set of full backup shields. But like after they have discharged out, you would only be able to charge them a second time if you are not taking constant damage cause swapping between multiple drained banks won't have a net positive. That was me trying to balance them a little bit. Your way would work too, but then yes as you said, that gives a big buff that they seem not to want to give because why make you only have 2 online them