Hi. Just got my 2017 cargo Tuesday night and have been reading the posts here as well as pouring over the manuals. I have never owned a vehicle with two batteries. The second one is under the passenger seat and it is for? And why is it needed? Really enjoy the van so far. The info on the nav system is very skimpy, so have been reading the manual on line. I had a 2014 Nissan nv1500, which I loved, but lost it in a fire. I searched for a van that would be a bit smaller and have more options like heated seats and the blind spot monitor, but still be able to carry all my windsurf gear. I drive from central California to Corpus Christi, TX for a month in the fall and another month in the spring to sail. Looking forward to setting up the van for the trips. I really enjoy reading all the questions and answers here.