| Ambient °F | Ambient °C | Minimum Voltage |
| 70 | 21.0 | 9.6 |
| 60 | 15.5 | 9.5 |
| 50 | 10.0 | 9.4 |
| 40 | 4.4 | 9.3 |
| 30 | -1.0 | 9.1 |
| 20 | -6.6 | 8.9 |
| 10 | -12.2 | 8.7 |
| 0 | -17.7 | 8.5 |
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