hello, after an accident with the transport of a opzv battery I would like your advice. can someone see in the photo if this battery is good inside? does the gel have a normal color or is there sulphation? I have 12 batteries (2v 1000 Ah) to build a battery bank and to connect to a quattro 24/8000. they are probably 15 years old and only used as ups for a communication station. thanks!