Abstract: A lighting device includes a base, a panel assembly, and a power supply assembly. The panel assembly is at least partially connected to the base and includes a luminous body. The power supply assembly is connected to the lighting device. The panel assembly includes a main panel and a plurality of auxiliary panels. The main panel is fixedly connected to the base, a first auxiliary panel among the plurality of auxiliary panels is rotatably connected to the main panel, and a second auxiliary panel among the plurality of auxiliary panels is rotatably connected to the first auxiliary panel.

Abstract: A battery pack includes: a housing formed with multiple accommodating cavities; and multiple cells, where a cell has an outer peripheral surface, and the distance between at least part of the outer peripheral surface and the intra-cavity wall surface of a respective accommodating cavity is greater than or equal to 0 mm and less than or equal to 1 mm. The outer wall surface of the housing is a heat dissipation surface, and the heat dissipation area of the heat dissipation surface is larger than or equal to 4.5 dm2 and smaller than or equal to 7 dm2.

Abstract: A charging system includes at least one first charging device and at least one second charging device that are cascaded. The first charging device includes at least one first accommodation portion for mounting a first energy storage device and a connecting port for connecting the second charging device or the first charging device. The second charging device includes at least one second accommodation portion for mounting a second energy storage device and a connecting port for connecting the first charging device or the second charging device. The first accommodation portion and the second accommodation portion have different shapes or dimensions.

Abstract: A charging system includes at least one first charging device and at least one second charging device that are cascaded. The first charging device includes at least one first accommodation portion for mounting a first energy storage device and a connecting port for connecting the second charging device or the first charging device. The second charging device includes at least one second accommodation portion for mounting a second energy storage device and a connecting port for connecting the first charging device or the second charging device. The first accommodation portion and the second accommodation portion have different shapes or dimensions.

Abstract: A lighting device includes a base, a panel assembly, and a power supply assembly. The panel assembly is at least partially connected to the base and includes a luminous body. The power supply assembly is connected to the lighting device. The panel assembly includes a main panel and a plurality of auxiliary panels. The main panel is fixedly connected to the base, a first auxiliary panel among the plurality of auxiliary panels is rotatably connected to the main panel, and a second auxiliary panel among the plurality of auxiliary panels is rotatably connected to the first auxiliary panel.

Abstract: A charging apparatus includes: a housing formed with an accommodating space; and a circuit board assembly disposed in the accommodating space and including at least a printed circuit board provided with multiple electronic elements. The output power of the charging apparatus is greater than or equal to 500 W and less than or equal to 2000 W, and the ratio of the output power of the charging apparatus to the volume of the charging apparatus is higher than or equal to 20 W/in3 and lower than or equal to 30 W/in3. With the preceding solution, the charging apparatus with a small overall volume and high output power can be provided.

Abstract: A charging system includes at least one first charging device and at least one second charging device that are cascaded. The first charging device includes at least one first accommodation portion for mounting a first energy storage device and a connecting port for connecting the second charging device or the first charging device. The second charging device includes at least one second accommodation portion for mounting a second energy storage device and a connecting port for connecting the first charging device or the second charging device. The first accommodation portion and the second accommodation portion have different shapes or dimensions.

Abstract: A charger includes a housing, a fan, and a circuit board assembly. The housing is formed with an air inlet and an air outlet. The fan is disposed in the housing and used for generating a heat dissipation. A heat dissipation channel for the heat dissipation airflow to flow through is further formed in the housing and includes a first channel and a second channel. A first port of the first channel facing the air inlet has a larger cross-sectional area than the second channel so that the heat dissipation airflow flowing through the first channel is capable of accelerating through the second channel.

Abstract: A lighting device includes a base, a panel assembly, and a power supply assembly. The panel assembly is at least partially connected to the base and includes a luminous body. The power supply assembly is connected to the lighting device. The panel assembly includes a main panel and a plurality of auxiliary panels. The main panel is fixedly connected to the base, a first auxiliary panel among the plurality of auxiliary panels is rotatably connected to the main panel, and a second auxiliary panel among the plurality of auxiliary panels is rotatably connected to the first auxiliary panel.