The disclosure relates to a power source
assembly for powering
high current low impedance devices from an Autonomous
Underwater Vehicle (20), AUV,
battery pack or an AUV and / or auxiliary battery packs (5,41), comprising: one or more
high current low impedance device (10) s, a
high current power source (100,110,42), wherein the high current
low impedance device is powered by the high current power source (100, 110, 42, 5), one or more AUVs (20), the one or more AUVs comprising an AUV or an AUV and / or auxiliary
battery pack (5), and the high current power sources (100,110,42,5) being configurable to provide a high current supply to the high current low impedance devices at one or more predefined current ranges, the high current low impedance device (10) further comprising a high current supply module (15) comprising an
electronic circuit adapted to: harvest a current from the AUV
battery pack or AUV and / or auxiliary battery pack (5, 41), store the harvested power in the high current power source (100, 110, 42), and supply high current to a connected high current
output device (16). The disclosure further relates to a method for maintaining a power source
assembly for powering high current low impedance devices from an autonomous
underwater vehicle (20) and a
system for a powering a high current low impedance devices from an autonomous
underwater vehicle (20).