Two separate benthic MFCs have been used to varying
effect, the first, a prototype had a mass of 230 kg and a volume of 1.3 m
−2
, and could sustain 24 mW or
the equivalent of 16 alkaline D-cell batteries per year [7]. This initial design consisted of 7 sub units
and required extensive manipulation of the marine sediment for deployment. A second design was
developed that had a mass reduced to 16 kg, a volume of 0.03 m
−2
and sustained 36 mW or the
equivalent of 26 alkaline D-cell batteries per year [7] (Figure 1). T