Batteries......Life of your trip!
When I bought my 21FBRS it came with an inexpensive Interstate 12V battery. I did not pay a lot of attention to it except to check fluid levels and for case condition/leaks. When I was working on the nuclear powerhouse in Augusta, GA the whole area lost power due to severe ice storms; power lines down for days, some areas for weeks. My little Interstate 12V battery lasted about half a day. Not good in minus degree weather which means no power for the heat to function. I asked lots of "OLD SALTS," experienced TT campers and RVers about batteries, even asked the engineers at the nuclear plant. Battery life or power depends on the battery(s), age, size, maker, output (cold cranking amps). CCA is the rating used to state how long a battery will function. This is what matters! My little Interstate Battery that came with my camper functioned as stated..very little! I also learned that a true deep cycle battery weights a ton due to all the lead used in its construction. After all my research, I now have two golf cart 6V batteries in my camper; great Trojan batteries. Like the golf carts seen being used and charged daily, they last and last through heavy use and re-charging. I can last 4-6 days on battery power pending what' turned on.
I did this thread so people will look at their battery better that I did. When you need it to work, I hope it does.
IBEW LU 613 Atlanta
Micro Lite 21 FBRS