What are the types of ordinary outdoor power sources?

　　1. Classify by battery type

　　The common outdoor power sources on the market generally use three types: lithium iron phosphate batteries, lithium polymer batteries, and lithium-ion batteries. These three types of batteries each have their own advantages and disadvantages, with the main differences being as follows:

　　Lithium iron phosphate batteries: high safety, long cycle life, relatively low price, but low energy density, large weight, and low charging and discharging efficiency.

　　Lithium polymer batteries: high energy density, light weight, variable shape, but low safety, short cycle life, and high price.

　　Lithium ion batteries: high energy density, high charging and discharging efficiency, moderate price, but low safety, short cycle life, fixed shape.

　　Taking all factors into consideration, lithium iron phosphate batteries are currently the mainstream choice for outdoor power sources, as their safety and durability are more suitable for outdoor environments, and their cost is also lower. Lithium polymer batteries and lithium-ion batteries are more suitable for small mobile power sources because they are lightweight and have a large capacity, but fire and explosion prevention should be taken into account.

　　2. Classified by output power

　　Output power refers to the maximum power that an outdoor power source can provide, generally expressed in watts (W). The greater the output power, the more types and quantities of electrical appliances can be powered, but it also increases the weight and price of the power supply. According to the output power, outdoor power sources can be divided into the following types:

　　Low power outdoor power supply: With an output power of less than 100W, it can generally only charge small electronic products such as mobile phones, tablets, and cameras. It is suitable for personal use, has good portability, and is affordable.

　　Medium power outdoor power supply: With an output power between 100W-500W, it can generally supply power to medium-sized appliances such as laptops, televisions, fans, and lighting fixtures. It is suitable for home or small team use, has average portability, and is reasonably priced.

　　High power outdoor power supply: With an output power of over 500W, it can generally supply power to large appliances such as refrigerators, microwaves, air conditioners, and electric pots. It is suitable for commercial or large team use, but has poor portability and high price.

　　Taking all factors into consideration, medium power outdoor power supply is currently the mainstream choice for outdoor power supply, as its output power can meet the needs of most outdoor activities and its price is also relatively reasonable. Low power outdoor power supplies are more suitable for lightweight travel, while high-power outdoor power supplies are more suitable for special occasions.

　　3. Classify by output interface

　　Output interface refers to the different types of power output that outdoor power sources can provide, generally including alternating current (AC), direct current (DC), USB, Type-C, etc. The more types and quantities of output interfaces, the more compatible electrical appliances can be, but it also increases the complexity and cost of the power supply. According to the type and quantity of output interfaces, outdoor power supplies can be divided into the following categories:

　　Single output interface outdoor power supply: only provides one type of output interface, usually AC or DC, can only supply power to one type of electrical appliance, suitable for specific purposes, simple and cheap.

　　Multiple output interfaces outdoor power supply: Provides multiple types of output interfaces, generally AC, DC, USB, Type-C, etc., which can supply power to various types of appliances, suitable for general use, rich in functions, and relatively high in price.

　　Outdoor power supply with expandable output interface: provides one or more types of output interfaces, but other types of output interfaces can be added through external modules or converters, which can supply power to more types of appliances, suitable for customized use, flexible and convenient, with different prices.

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