The outdoor power supply is a portable energy storage power supply with a built-in lithium-ion battery and its own energy storage. It can provide convenient power for various electrical equipment, and can solve various power needs in one stop, especially in special occasions. When it comes to outdoor power supply, many people's first reaction is that it is only used for camping in the wild, and some people may confuse. On the basis of the above selections, some outdoor power supplies have many bonus options. For example: with solar panels, a steady stream of battery life guarantee. In. ● Types There are three types of batteries for outdoor power supply: ternary lithium batteries, lithium iron phosphate batteries, and lithium polymer.