Battery Storage

Outside Interests reader Jim L. wants to know: “How is it best to handle batteries on the winter? Do I take them out? Store in my cold garage? Do I put a charge on them all winter to keep from freezing? Do I add water in the winter when they are not used? Do I store them on wood rather than concrete? HELP!! Before cold winter comes to Tennessee.”

Thanks for asking, Jim. It’s that time of year for many Outside Interests readers to think about winter storage. From your question, we’ll assume you don’t have an electrical outlet near where you keep your Airstream during the cold months.

In this case the best approach is to remove the batteries from the trailer and store them somewhere that you can keep them plugged into a device designed specifically to maintain batteries. We’re not talking about a typical battery charger here, but a dedicated battery maintainer. You can keep the batteries hooked up to a charge maintainer all winter without fear of overcharging. They are easily found in auto parts stores or online.

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You should add distilled water to the batteries anytime they need it (after first disconnecting the charge maintainer). The water will mix with the electrolyte in the batteries and won’t freeze as long as the battery is kept charged.

The stories you may have heard about storing batteries on wood instead of concrete are old myths based on batteries made in the olden days. You can read much more about winterization, batteries, and proper maintenance procedures in The (Nearly) Complete Guide To Airstream Maintenance.

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