VRLA AGM: design life 7-10 years VRLA GEL: design life 12 years VRLA GEL 2 volt cells: design life 20 years The AGM range has very low internal resistance making them particulary suitable for high current discharge applications such as for inverters, thrusters and winches as well as engine starting. The GEL model range offer best deep cycle durability and overall longer life. The use of high purity materials and lead calcium grids ensure that for both AGM and GEL products have particulary low self discharge so that they will not go flat during long periods without charge. Both ranges are supplied with M8 drilled, flat copper terminals ensuring best possible connection contact and eliminating the need for battery terminals. Manufactured under ISO 9002 quality standards, they are compliant with both CE and UL specifications in ABS fileproof containers and come with Victron's 2 year world-wide warranty.