How long will a portable power supply run？
A portable power supply is a device that can provide power to mobile devices. They usually consist of batteries that can be charged or replaced to provide power. Portable power supplies are widely used to charge smartphones, tablets, laptops, cameras, drones, and other electronic devices.
Therefore, a portable power supply is a essential product for outdoor activities and travel. It can not only solve your power problem, but it is also a good helper for emergency rescue when you encounter difficulties outdoors.
But friends who are just about to buy a portable power supply may have some questions. How much power do I need from a portable power supply? How long will the portable power supply I purchased last?
Before answering these questions, let us first have a brief understanding of portable power supplies.
Capacity and output power: The capacity of a portable power supply is usually measured in milliamp hours (mAh) or watt hours (Wh), which determines how much power it can provide to a device. Output power is also important because different devices require different currents and voltages.
Charging method: The portable power supply can be charged through different methods such as sockets, USB ports, solar panels, etc. Some portable power supplies also support fast charging technology.
Output port: Usually has output ports such as USB, USB-C, AC power socket, etc. to adapt to the charging needs of different types of devices.
Weight and Dimensions: The size and weight of portable power supplies vary by model. Smaller, lighter models are better suited for carrying in a pocket or backpack.
Smart functions: Some portable power supplies have smart functions, such as LED displays, battery status indicators, overcharge protection, over-discharge protection, etc., to provide better user experience and battery protection.
How long will the portable power supply I purchased last?
How long a portable power supply lasts depends on several factors, including the capacity of the power supply, the connected device, the device's battery capacity, charging speed, and the efficiency of the portable power supply. Here are estimates for some common scenarios:
Smartphone charging: If you use a portable power supply with a 10,000mAh capacity to charge an average smartphone (typically with a 2,000mAh to 4,000mAh battery capacity), you can estimate that you can charge 2 to 4 times, depending on the smartphone. Battery capacity and efficiency of portable power sources.
Tablet Charging: Tablets typically have larger battery capacities and will take longer to charge. Using the same 10,000mAh portable power supply to charge a tablet may only be enough for one charge or less.
Laptop Charging: Charging a laptop usually requires more power, so the usage time is shorter. A high-capacity portable power supply (usually above 20,000mAh) may be able to charge an average laptop once or twice.
Charging multiple devices: If you connect multiple devices to charge at the same time, the usage time will be shorter because the power supply needs to distribute power to each device.
You can estimate how long a portable power supply will last by doing the following simple calculation:
Usage time (hours) = power supply capacity (Wh or mAh) / (power demand of the connected device (W) * charging efficiency)
How much power should I buy in a portable power supply?
Determine the power requirements of the charging device: First, understand the power requirements of the device you plan to charge using a portable power source. This can usually be found in the device's instructions or on the power adapter. Power is usually expressed in watts (W). Make sure the maximum output power of the portable power supply (usually expressed in W) at least matches the power requirements of the device, and preferably slightly exceeds the device's needs.
Consider additional devices: If you plan to charge multiple devices at the same time, or want the portable power supply to be able to meet possible future charging needs, it is recommended to choose a higher-power portable power supply. This will ensure you have enough power to support multiple devices or more powerful devices.
Can I use a portable power source to charge a high-power appliance like a refrigerator?
Charging a refrigerator is a relatively complex task that usually requires a very powerful power source, as the refrigerator's compressor and cooling system require a lot of power to operate. Ordinary portable power supplies often do not provide enough power to support the operation of a refrigerator.
Refrigerators usually plug into household electrical outlets, which provide stable alternating current (AC power), while portable power supplies usually provide direct current (DC power). In addition, the power requirements of refrigerators are usually above a few hundred watts (Watts), while most portable power supplies are usually between tens of watts and hundreds of watts.
Therefore, in general, portable power supplies are not suitable for charging refrigerators. If you need backup power for your refrigerator, you'll usually need to use a generator or backup power system, which can provide enough power to run the refrigerator and can be connected to your home's electrical system.
To provide backup power to your refrigerator, it is best to consult a professional electrical engineer or a professional company that installs professional backup power systems to ensure safety and reliability. Incorrect power supply may damage the refrigerator or cause hazardous conditions.
The above is a summary of some issues about portable power supplies. If you have other questions, please come to our official website and social media for consultation.
