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Hawker ZeMaRail VRLA, AGM and Gel are maintenance-free rolling stock batteries with gel instead of liquid electrolyte. The main effect of gel electrolyte in AGM-technology is the higher cycle performance and deep discharge resistance. An additional side effect of Gel electrolyte in AGM-technology is the more efficient heat management.
The hydrogen recombination is equal (up to 98%) than at a standard AGM type (gel with rigid separator has less). Those batteries are certificated by Swiss Federal Railways. The certification of includes: cycling, deep discharge, shock and fire protection requirements for the entire battery system including the tray.
ZeMaRail VRLA, TPPL+Sn are maintenance-free rolling stock batteries with Thin Plate Pure Lead (TPPL) technology. TPPL+Sn technology packs more power into the same space as a conventional battery and till now only EnerSys can deliver such batteries. Due to the purity of the materials used in construction corrosion and water losses are reduced, storage and service life is extended moreover resistance to abusive deep discharges is increased.