Sun Xtender Batteries provide VRLA-AGM Deep-cycle batteries for off-grid and grid-tied systems. Featuring sealed, no maintenance design with no spilling, these batteries offer the option to operate in any attitude. Copper alloy, corrosion-free connections provide for maximum conductivity and no lead exposure. This is the original AGM battery technology adopted by the US Military since 1986. Sun Xtender provides long service life, long float life, and reliable operation at temperature extremes. Batteries ship fully charged Hazmat Exempt via land, sea, or air.