Jackery 500 plus battery to raise 12v amps

[richardhh]

I have a question about supplementing the battery amps available to extend camping time off grid. I have a Jackery 500 and a Casita Liberty and my question is this. Can I link the Jackery to the 12v system in the Casita using a cigarette plug on boths ends of an extension cord plugging one end into the 12v output (female cigarette receptacle) on the Jackery and the other end into the female cigarette receptacle in the Casita? The output of the Jackery is 10A from its 12v receptacle. This should be in parallel so the voltage won't change from 12v.

Am I looking at this correctly? It seems to me that this would be like adding another battery in parallel to add to the amperage (read time to discharge) available. Oh, another question! Does anyone know how many amps the Dometic refrigerator draws when it is on propane. I can't find it anywhere in the specs from the Dometic literature. I know there has to be some power consumption to run the frige panel and igniter. Thanks!

[Markz]

If you let that system discharge, you could kill your smaller battery. Better to use and charge both batteries separately.

[Wayne Collins]

I don't know what a Jackery is.
Connecting two 12 volt batteries in parallel will increase the time to discharge assuming a steady amperage draw (load)
The fridge is the heaviest load, and should only be operated on 12 V while traveling.
If boondocking, run the fridge on LP (Liquified Propane).
There is NO amperage draw with LP. Just be sure the 12 v and 120 v switches are OFF.
To extend battery life, keep lights off when not needed. Install LED bulbs.

[Timber Wolf]

I assume your Jackery is some sort of battery pack or jump starter with a 12V accessory port. Personally I would not tie it into my camper’s system for a couple of reasons. One, dissimilar batteries. Two, a 12V accessory plug (or two in this case) is a low wattage affair and more connections means more issues. I would recommend just using the Jackery stand-alone for whatever loads (phone charging, lights, etc.) it can serve and minimize the trailer battery usage.