| Battery | Standard Specific Gravity | 1.25 to 1.29 at 20°C (68°F) |
| Standard Voltage | 12.6 to 12.8 V at 20°C (68°F) | |
| Fuse | Standard Resistance | Below 1 Ω |
| Charging circuit without load | Standard Current | 10 A or higher |
| Standard Voltage | 12.9 to 14.9 V | |
| Charging circuit with load | Standard Current | 30 A or higher |
| Brush length | Standard exposed brush length | 9.5 to 11.5 mm (0.374 to 0.453 in.) |
| Minimum exposed brush length | 4.5 mm (0.177 in.) |
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Slip ring - Slip ring | 20°C (68°F) | 1.85 to 2.25 Ω (for 80 A Type) |
| 1.65 to 2.05 Ω (for 100 A Type) | ||
| Slip ring - Rotor core | Always | 10 kΩ or higher |
| Slip ring diameter | Standard diameter | 14.2 to 14.8 mm (0.559 to 0.583 in.) |
| Minimum diameter | 14.0 mm (0.551 in.) |