Got tired of listening to the generator, wanted to try the peace and quiet of 12 volt lights. They look like they are gonna work pretty good just from judging in the yard on the trailer last night. Question is, if I wanted to run 2 batteries in unison, do you just use jumpers from pos to pos and neg to neg to let the batteries feed off each other? I know you could just switch the leads to a second battery but I know there are plenty of folks are running batts in unison. Also if someone is looking for 110 volt LEDs or the yellow film for lights, I have both that I will sell.

Yep, pos to pos, neg to neg. Nothing tricky about it. It would be preferable that the batteries are the same type and age so they have very similar resting voltage. Otherwise they try to charge each other when not in use and drain each other down. Or you could put them on an isolator or disconnect them after use....

^^^ what he said.

Off topic- what kind of Amber light bar is that or is it a cover?

Thanks y'all. It's a rigid bar with the yellow film on the lens.