Image of Stretchable Pump
Bending the pump. (©Vito Cacucciolo/2019 EPFL)

Most soft robots are actuated by rigid, noisy pumps that push fluids into the machines’ moving parts. Because they are connected to these bulky pumps by tubes, these robots have limited autonomy and are cumbersome to wear at best.

Researchers developed the first entirely soft pump – even the electrodes are flexible. Weighing just one gram, the pump is completely silent and consumes very little power, which it gets from a circuit that includes a rechargeable battery.

Source