Battery Life in Storage

[Al and Missy]

Just a single data point, but I put my trailer in storage 11/7 with batteries (2 group 27 Interstate wet cells) connected but disconnect switch off. I pulled the trailer 12/27, turned the disconnect on, and the batteries were good enough that I didn't notice a difference in the speed of the tongue jack.

Al

[Burnside Bob]

Hi Al and Missy:

I keep an eye on my batteries, too. I check voltage with a digital multi-meter every few days in the hopes that this will tell me if I need to replace the batteries, which by age should be about done for.

Trailer is "stored" in driveway--charged up batteries using stock converter, then flipped battery isolation switch to "off". Batteries are group 24 Interstate flooded that are 4 years 4 months old. Isolation switch disconnects everything except tongue jack, which has not been used. Temperatures have been cool with day time highs 38-45 and night time lows 22-35, except last 36 hours, 48-53 degrees day and night, raining.

Nov 26. 11 AM. 24 hours after charging. 13.16V
Nov 27. 9:30 AM. 13.06V
Nov 29. 10 AM. 13.00V
Dec 3. 11:30 AM. 12.95V
Dec 9. 8:30 AM. 12.88V 25 degrees
Dec 27. 9:30 AM. 12.77V 34 degrees
Dec 29 11:30 AM. 12.79V 53 degrees.