Battery charging

Thanks for that info sailor, I wasn't aware of that.  How much do those batteries weigh?  Robwid, as far as I am concerned, the competition is still on, hopefully you  are still planning on using those current batteries in your Winnebago.  We just returned from 2 weeks in Colorado, our main stays were at Black Canyon of the Gunnison (stunning) and our favorite RMNP near Estes Park.  Even with night temps between 36-39 we still got a good 3+ days out of each battery before switching to the other.  After 3 days the S.O.C. showed 33%.  Still not bad for batteries that are closing in on 7 years of faithful service.

Hi Jato,

Robwid.  Let's have a contest.  Our batteries (2 12v deep cycle group size 24) turned 6 years old in March and are now going on year 7.  They get used a fair amount and when they expire, and I expect them to maybe this year? I plan on going the route you took by getting 2  6 volt golf cart batteries.  Now it is a waiting game to see how long they will last.

You have to connect the jumper cables to both batteries, they are in series. There should be a POS connection (12V) and a NEG connection (GRD), and a connection from POS to NEG, that puts them is series. Put the jumper cables on the lone POS and NEG terminals, not on the interconnected ones. Make sense?

I will probably be pushing the limits of my 6 year old batteries while dry camping over the coming holiday weekend.  I understand that it's better to use jumper cables from the tv rather than the Bargman cable when topping up batteries.  My trailer has two 6 volts batteries connected in series.  Do I need to jump these batteries separately or simply connect the neg jumper to one trailer battery and the positive jumper to the second trailer battery?