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Researchers have created a robotic fish powered by a battery fluid that its developers dub ‘robot blood’.
The roughly 40-centimetre soft robot doesn’t have solid batteries — instead it is propelled by a dual-function fluid that stores energy and moves the fish’s fins. The approach allows the machine to store more energy in a smaller space and operate for longer periods without the need for heavy and cumbersome battery packs.
The approach increased the amount of energy stored in the robot by 325%, compared with a machine that has a separate battery and hydraulic-fluid system, says Shepherd. The team calculated that the robot would be able to function for 37 hours without requiring recharging.