Wow, good question but I'm pretty sure I remember looking at the Jay Flight G2's (which have more options than the regular Jay Flight) and being told that the battery comes with both trailers. We also bought another one to have two and they installed it for us. Pretty certain though that one battery is standard.
-Denise, DH, grandkids, and two rescue pups
-2009 Ford F-150 SuperCrew, 5.4L 3v 6speed, 3.73 limited slip, 18" LT rated tires, Max towing package
-2010 Jayco Jay Flight G2 29bhs
CLICK HERE to 30% $$ off your next Jayco RV