The energy of a portable energy storage power station per kilowatt-hour is 1 kilowatt-hour (kWh) or 3.6×10⁶ joules (J). Here are some more detailed examples of how long it can be used for common devices:
Charging a mobile phone
The battery capacity of mainstream mobile phones on the market is usually in the range of 4000mAh - 6000mAh. Taking the common 5000mAh, 3.7V mobile phone battery as an example, the formula (power = current × voltage × time, 1Ah = 1000mAh) is used to calculate that the battery power is 5Ah×3.7V = 18.5Wh, that is, 0.0185kWh. From the theoretical data, the number of times that a kilowatt-hour (1kWh) energy storage power supply can charge this mobile phone is 1÷0.0185≈54 times.
Powering laptops
The power of ordinary laptops varies depending on the usage scenario and hardware configuration, and is roughly between 60W and 200W. Taking a daily office thin and light notebook with a power of 65W as an example, the energy storage power supply of one kilowatt-hour can be used for 1000Wh÷65W≈15.4 hours.
Powering projectors
The power span of common projectors is large, about 70W-300W. If the power of the projector is 70W, the energy storage power supply of one kilowatt-hour can make it work for 1000Wh÷70W≈14.3 hours. This type of low-power projector is generally suitable for scenes with smaller spaces such as small conference rooms or family bedrooms. If it is a high-brightness projector used in large conference rooms, classrooms and other places, the power may reach 150W or even higher. When the power of the projector is 150W, the energy storage power supply of one kilowatt-hour can make it work for about 1000Wh÷150W≈6.7 hours. .
Powering an electric fan
General household electric fans have relatively low power, with a common power of about 60W. One kilowatt-hour of energy storage power can keep it running for 1000Wh÷60W≈16.7 hours. This means that in summer, if such an electric fan is used, one kilowatt-hour of energy can keep it running for most of the day. Moreover, the power of different wind speed gears of electric fans is slightly different, with high-speed gear power slightly higher and low-speed gear power slightly lower. For example, the power of high-speed gear may be 60W, while the power of low-speed gear may be around 45W. If it runs at low speed, one kilowatt-hour of energy storage power can keep the electric fan running for 1000Wh÷45W≈22.2 hours.
Powering a drone
Ordinary consumer drones have a power of about 70W, and one kilowatt-hour of energy storage power can keep the drone flying for 1000Wh÷70W≈14.3 hours.
