Breakthrough in wireless charging technology frees new sex dolls from the constraints of power cords. The piezoelectric fabric system developed in South Korea converts mechanical energy when the user touches it into electrical energy, providing continuous power for the torso sex doll. The "zero power consumption" version launched by an environmentally friendly brand is more radical - its surface is covered with 3 million microbial fuel cells, which generate electricity by decomposing skin secretions. This energy solution extends the product's battery life to 45 days, but early users reported that microbial metabolism produces special body odor, forcing manufacturers to rebalance ecology and technology acceptance.