 Stretchable micropower sources with high energy density and stability under repeated tensile deformation are key components of flexible slash wearable microelectronics. The resulting Kurigami MSCA's exhibit a high aerial capacitance of 111.5 mfcm-2 and are stable upon stretching of up to 100% elongation and in bent or twisted states. This article was authored by Shenzhen Zhao, Aiguo Zhou, Mingzai Wu, and others.