AYK Energy, one of the world’s fastest growing marine battery manufacturers, is building a new 4,200 KWh battery for Spanish ship owner Mureloil after striking its latest deal. The agreement will see AYK’s Aries + battery supplied on a new 7999 DWT diesel-electric product tanker being built for Mureloil at Astilleros Murueta shipyard near Bilbao. The ship …