GP645 
| Cells Per Unit | 6 |
| Voltage Per Unit | 12 V |
| Capacity | 40 Ah @ 20hr-rate to 1.75V per cell @ 25°C (77°F) |
| Weight (kg) | Approx. 12.92 kg. (28.48 lbs.) |
| Maximum Discharge current (A) | 400 A (5sec.) |
| Internal Resistance Approx. | Approx. 8.5 mΩ |
| Operating Temperature Range | Discharge：-15℃~50℃(5°F~122°F) Charge：-15℃~40℃(5°F~104°F) Storage：-15℃~40℃(5°F~104°F) |
| Nominal Operating Temperature Range | 25°C ± 3°C (77°F ± 5°F) |
| Float charging voltage | 13.5 to 13.8 VDC/unit Average at 25°C (77°F) |
| Recommended Maximum Charging current limit | 12 A |
| Equalization and Cycle Service | 14.4 to 15.0 VDC/unit Average at 25°C (77°F) |
| Self Discharge | It should be more than 75% of the capacity that before storage after stocked for 6 months at ambient temp. 25℃ |
| Terminal | B8 -L terminal (M5 bolt) or Recessed type (M6 bolt) |
| Container Material | ABS(UL94-HB) & Flammability resistance of(UL94-V0) can be available upon request. |