NOTE: On this method, providing batteries have been sized correctly for engine and charged correctly, an open terminal voltage of 12.5V or greater should be present.
The following table is for Lead Acid batteries with removable vent caps that can have electrolyte or distilled water added to them for routine maintenance.
| % Charge |
|
| Specific Gravity |
| Voltage (DC) on |
|
|
|
| a 12V battery | ||
|
|
|
|
|
| |
100 |
| 1.265 |
| 12.8 | ||
75 |
| 1.225 |
| 12.5 | ||
50 |
| 1.19 |
| 12.4 | ||
25 |
| 1.155 |
| 12.0 | ||
| Discharged | 1.12 |
| 11.5 | ||
NOTE: If the voltage across the terminals shows around 10.5V, this may indicate a shorted cell is present.
Section 75 | |
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