Heavy-duty Deka AGM 8A8D battery by East Penn Battery. AGM technology allows for a completely sealed maintenance-free battery with no sulfuric acid leaks, no acid clean up. 245 amp hour at 20 hour rate. Weight: 158 lbs. Length: 20 3/4 in. Width: 11 in. Height: 10 in. 12VDC nominal. Made in USA. Available at: MULTISOLAR TECHNOLOGIES LIMITED