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 ...
Damage will probabky not be immediately noticed. I would just charge it and use it until you notice it not holding a charge as it should. Coukd be years from now.
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