LG HD2 4S21P Specifications
| Configuration | 4S21P |
| Cell | LG 18650HD2 |
| Cell size | 18650 |
| Cell chemistry | |
| Weight | 4.0 kg |
| Length | 2.11 cm |
| Width | 42.64 cm |
| Height | 27.27 cm |
| Charge voltage | 16.80 V |
| End voltage | 10.00 V |
| Capacity | 42000 mAh |
| Maximum continuous discharge current | 10 A |
| Charge current | 5 A |
| Watts | 146 W |
| Energy | 613 Wh |
| Volumetric energy density | 416.60 Wh/L |
| Gravimetric energy density | 152.03 Wh/kg |
| Charge time | 5 hours |
| Operating temperature | -20 ~ 70 °C |
Size Variations
LG HD2 4S21P 1-layer in parablock 1x21
| Length | 81.66 mm |
| Width | 426.36 mm |
| Height | 68.06 mm |
LG HD2 4S21P 1-layer in parablock 7x3
| Length | 566.46 mm |
| Width | 62.76 mm |
| Height | 68.06 mm |
LG HD2 4S21P 1-layer in parablock 21x1
| Length | 1697.6 mm |
| Width | 22.3 mm |
| Height | 68 mm |
LG HD2 4S21P 2-layer in parablock 3x7
| Length | 122.1 mm |
| Width | 143.6 mm |
| Height | 136.3 mm |
LG HD2 4S21P 2-layer in parablock 7x3
| Length | 283.7 mm |
| Width | 62.8 mm |
| Height | 136.3 mm |
LG HD2 4S21P 2-layer in parablock 1x21
| Length | 41.3 mm |
| Width | 426.4 mm |
| Height | 136.3 mm |
LG HD2 4S21P 2-layer in parablock 21x1
| Length | 849.26 mm |
| Width | 22.36 mm |
| Height | 136.26 mm |
LG HD2 4S21P 4-layer in parablock 3x7
| Length | 61.5 mm |
| Width | 143.6 mm |
| Height | 272.7 mm |
LG HD2 4S21P 4-layer in parablock 7x3
| Length | 142.3 mm |
| Width | 62.8 mm |
| Height | 272.7 mm |
LG HD2 4S21P 4-layer in parablock 21x1
| Length | 425.1 mm |
| Width | 22.4 mm |
| Height | 272.7 mm |
LG HD2 4S21P 4-layer in parablock 1x21
| Length | 21.1 mm |
| Width | 426.4 mm |
| Height | 272.7 mm |
Calculations
Q. How to calculate the voltage for 4S21P LG HD2 pack?
A. Take the nominal voltage of the LG HD2 (3.65V) and multiply it by series connections (4) for a total of 14.60V.
Q. How to calculate the capacity and current for 4S21P LG HD2 pack?
A. Take the nominal capacity of the LG HD2 (2.00Ah) and max. continuous discharge current (25 A) and multiply them by the parallel connections (21) for a total of 42.00Ah and 525A.