of renewable energy sources such as solar energy, [1] wind energy, [2] and ocean energy [3] have attracted extensive attention in the past decades. Rainfall, an important component of the Earth's water cycle, is a very familiar natural phenomenon. Furthermore, raindrop energy is also a kind of renewable energy source which contains two parts of energy. One is the kinetic energy which is coming from the potential energy and the other is the electrostatic energy that is generated by contact friction with the air and the dielectric material. [4,5] However, they are consistently omitted from the applications because of the technological constraints.The triboelectric nanogenerator (TENG) has been proven as an up-andcoming candidate for energy harvester by virtue of novel working mechanism, multiple structures and working modes, and extensive material selections. [6][7][8][9][10][11][12] TENG derived from Maxwell's displacement current and the charges in surface polarization are on the basis of two combined effect of triboelectrification and electrostatic induction. [13] Four basic working modes stemmed from the principle of a TENG carry the advantages of harvesting almost all kinds of energy, ranging from slight acoustic flow to faint heart beats and from clean natural energy to ubiquitous mechanical power. [14][15][16][17][18][19][20] Therefore, efforts based on TENG made the harvesting of raindrop energy no longer a dream and TENGs with different structures and materials have been continuously reported. [21][22][23] Researchers have fabricated contact-sliding mode TENG with highly hydrophobic surface to attaining periodic contact and separation between water and a solid substrate. [22][23][24][25][26] In addition, the freestanding TENGs with interdigitated electrode have also been developed to collect raindrop energy, which can generate higher electrical output than a single electrode contactsliding TENG. [27][28][29] On the other hand, the collection of kinetic energy from raindrop was also carried out by contact-separation mode TENGs. [30] Although previous reported TENGs can effectively harvest one type of raindrop energy source, simultaneously collecting all energy sources carried by raindrop still remains challenging.Herein, a highly integrated TENG has been developed for simultaneously harvesting all the energy sources which exist in raindrop. The integrated TENG consists of a saccular contactseparation mode TENG (SCS-TENG) for collecting the kinetic energy from raindrops, a freestanding TENG with interdigitated electrodes (I-TENG) attached to the upper surface of the The emergence of triboelectric nanogenerators (TENG) has promoted the harvesting of raindrop energy, which mainly includes the kinetic energy and electrostatic energy generated during the fall of raindrops. However, maximizing the use of such energy is quite challenging due to its fragmentary characteristics. A highly integrated TENG is developed that can efficiently collect raindrop energy. It consists of a saccular contact-separation mode TENG ...