MK Sealed AGM Batteries These are completely Sealed, absorbed glass mat, valve-regulated batteries with efficient recombination. AGM batteries are recommended for battery backup standby power systems where batteries are in float service with occasional deep discharges. These batteries are rated for 500 cycles at 50% depth of discharge. They can operate at temperatures from -40 to 140 F. Delivered from one of 20 MK warehouses across the U.S.A.
