The new EL range is manufactured as per Exide's proprietary Torr Tubular Technology using one of the world's most exclusive, advanced and state-of-the-art "HADI" high pressure spine casting (at 100 bar) machines, which is not commonly available. With our hi-tech R&D centre at Kolkata, Exide has developed the high corrosion-resistant and robust spine technology using the HADI process which ensures a superfine grain structure for strength, long life and highest reliability.