HR1218W 
| Cells Per Unit | 6 |
| Voltage Per Unit | 12 V |
| Capacity | 51W @ 15 minute-rate to 1.67V per cell @ 25°C (77°F) |
| Weight | Approx. 3.85kg (8.49 lbs) |
| Maximum Discharge current | 180A (5sec.) |
| Internal Resistance Approx. | Approx. 13.6 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 | 5.1A |
| 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 | F2-Faston Tab250 |
| Container Material | ABS(UL94-HB) & Flammability resistance of(UL94-V0) can be available upon request. |