Personally I don't see where it is OORP.
In any battle there are supply lines of ammo, medics & such, makes sense it would happened in this venue as well. Thinking about it, The ship supplying nanos & batteries is risking itself to do so & lowering it's abilities to repair it's own shields and hull. So basically it evens out. That & it prolongs the engagement which makes it more fun for all involved in the said battle. & Capt.Poo just gave me an idea for our groups next large scale battle, Don't know why we never considered taking a repair ship along, makes perfect sense.
Now I wonder if taking a mid sized freighter loaded with missiles, mines & torp's to re arm ships would be pushing it too far?
Just my 2 cents.. (After tax & inflation.. crap I owe money to post.. arrrr!!)