A battery is like a piggy bank, if you keep taking out and putting nothing back you soon have nothing.  The voltage should only be read when the engine is off and no loads are connected, the battery has to rest for at least 12 hours to remove the surface charge (or turning on your high beam for about 1 minute will remove the surface charge).

State of Charge

Battery Voltage

Specific Gravity

100%

12.65

1.265

75%

12.45

1.225

50%

12.25

1.190

25%

12.05

1.155

0%

11.90

1.120

2017-05-24T14:03:01+00:00July 31st, 2012|

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