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Revolutionary Battery to Power Marine Robots
Lithium seawater battery
Lithium-seawater batteries commercially available within a year
By RBR Staff

Lithium is already widely used in batteries because it is lightweight and has a high electrochemical potential. This potential allows it to generate in excess of 3 volts compared with 2 volts for lead-acid batteries and 1.5 volts for zinc-carbon cells. Today’s lithium batteries pack plenty of energy by weight: around 400 watt-hours per kilogram compared with 100 Wh/kg for alkaline batteries and 40 Wh/kg for lead-acid batteries.

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