How to choose new 8D house batteries.
Existing batteries are 5 yrs old 8D AGM's. after only running my ceiling fan for an hour or two they're discharged down to 12.5V from 13.5. I'm guessing they are nearing the end of their lifespan.How ...
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If you find out you need replacement batteries, consider trying to find used cell phone tower back up batteries. They spec at 139 amp-hours and have lots of life left in them for RV'ing. I got mine from Interstate.
