Viking 12AH Compact Power Pack

Specifications

Chemistry – LiFePO4
Nominal V – DC 13.2 V
Weight –  21.5 oz (610 g)
Volume (excl wires) – 46.0 in³ (754 cm³)

Claimed capacity – 12,000 mAh

320 mA (0.12 C) discharge rate – 2586 mAh capacity, 8:00:06 running time
1300 mA (0.5 C) discharge rate – 2777 mAh capacity, 2:07:09 running time
2100 mA (0.81 C) discharge rate – 2764 mAh capacity, 1:18:18 running time
TR Cycle – (alt. 0.18-1.8 A discharge) – 2719 mAh capacity, 3:44:33 running time

Measured Energy – 36.66 Wh @ 0.5 C rate

Measured Specific Energy  – 1.71 Wh/oz (60.1 Wh/kg)
Measured Energy Density – 0.56 Wh/in³ (48.6Wh/L)

Notes

The Viking Compact PowerPack was advertised as a 12,000 mAh battery, but it tested at only 23% of it’s advertised capacity.  It’s relatively low Specific Energy and Energy Density is mostly due to a large plastic case containing the cell pouches, charge circuitry and an LED light source and switches.  It’s four LiFePO4 pouch cells allow it to deliver very high currents for a short period of time, since it’s advertised use is as a vehicle jump-start battery.  For this purpose it is supplied with a set of car battery clamps.