Well we have just about nailed the Deep Six battery pac down. We have been testing it and are happy with our findings , the pac has stood up to the rigors of deep sea fishing well. There are 2 models, the standard and the pro . basically the only difference between the two is the receptical cover plate. The standard has a Leviton duplex cover plate and the Pro has a Hubbell mono super delux cover. The Battery box has many uses, it can be used in emergencies to run radios, pumps, lights, computers, start a car or truck and the list goes on. They will power 2 Precision Auto reels for multiple days of fishing.