far in his footsteps, breathing and nervous energy were used to charge the batteries, and now researchers at the Georgia Institute of Technology scientists have done by changes heat. They did nanogenerators called pyroelectric polarization changes, using thermal energy to harvest temperature fluctuations. Normally, the output current is too low for commercial electronics, but make a lead zirconate titanate with (PZT), the team has managed to create a device that can recharge a lithium-ion button to power an LED green for a few seconds. Researchers predict that doubling the surface, which could lead to or LCD wireless sensors using only ambient temperature changes of driving or water, for example. The result could be green energy, but without all those pesky movement.

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