Battery damage
2 1/2 yr old 12v battery that has had good maintenance. Took rig to the shop for some routine maintenance on other systems. Battery read 12.8 . Today (5 days later) battery read 9.8v. I've read on ...
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I suspect your battery has shorted internally. They can do this at any age.
If so, you will not be able to charge it.
If so, you will not be able to charge it.
