Cold-weather pack, 37 800 mAh. Charges down to -20 °C, discharges to -40 °C.
Specifications
| Rated capacity | 37 800 mAh (1 852.2 Wh) |
| Rated voltage | DC 50.4 V |
| Charging limit | DC 58.8 V |
| Discharge temperature | -40 to +60 °C |
| Charging temperature | -20 to +60 °C |
| Fits | B2 and B2-W |