Deka Solar / MK Battery series of AGM (absorbed glass mat) valve-regulated lead acid batteries. The Deka and MK Battery AGM (absorbed glass mat) valve-regulated lead acid batteries are designed to offer reliable, maintenance-free power for solar electric, renewable energy applications, boat and marine battery use, and ups systems. No battery equalization charge is ever required. MK Battery and Deka AGM (absorbed glass mat) valve-regulated lead acid batteries are ideal for small to medium sized solar electric and renewable energy systems. Rated non-spillable by ICAO, IATA, and DOT.