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Anonymous users2024-02-08When the speaker is working, the volume and audio level change and the current intensity are different. We only estimate the power of the horn; Horn operating current, 3 4=.
It is estimated to work for about 9 hours and 15 minutes.
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Anonymous users2024-02-07Use the power bank directly.
Drive the horn? If the horns are connected in parallel.
Approx. 1.6 euros. 5／1·6＝3·125a
5 3·125 1·6 hours.
If tandem 5 6·4 0·78
5 0·78 6·4 hours.
The DC resistance of the 4 ohm horn is about 3·2 ohms.
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Anonymous users2024-02-06According to the power amplifier plus the horn, generally speaking, the total power consumption of the 6 watt speaker should reach about 12 watts, so time = battery voltage * battery capacity * 70% power consumption = hours.
Since the volume is not necessarily turned on to the maximum, it will be used for a little longer.
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Anonymous users2024-02-055000 mAh battery with one amplifier and two 6 3W speakers.
It can be left for about 4 hours.
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Anonymous users2024-02-04What is the voltage of this battery, according to the calculation that the voltage is multiplied by ampere-hours equals the power watt-hours, the lithium battery of 3.7 volts and 5,000 mAh (18500 1000 = storage capacity is 18.5 watt-hours, which can make the three-watt load work continuously for a little more than six hours.
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Anonymous users2024-02-03Correction: 1. The capacity parameter of the battery is milliampere-hour.
Write "mah".
2. The voltage of the battery must be known.
Calculation method: [Assuming the battery voltage is.]
1. Find the load current of 3 watts first.
3 watts 2, find the time.
5000mah÷
i.e. hours.
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Anonymous users2024-02-02For a 5000 mAh battery, 3 watts of output can be used for several hours, the higher the voltage, the longer it will be used.
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Anonymous users2024-02-01If the load is matched with a 5V DC power supply, the current consumption is a full amount of 5000 mAh of the mobile power supply converted to the output of 5V port, and the conversion rate is about 63% (this includes the working efficiency of the booster plate, and the conversion rate of the average voltage of the mobile power cell to 5V). That is, a 5000 mAh power bank can output about 3150 mAh of power.
3150 mAh of power can be used for a 540 mAh load with 3150 mAh 540 mAh = hours.
The above is a theoretical value, in practice, is the load a standard 5V matching? Is there enough power bank? What is the real data of power bank boost work efficiency? Factors such as wire and socket losses can have an impact on the results.
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Anonymous users2024-01-31If it is 5V, it can be used for 7 to 8 hours. It lasts for 5 to 6 hours.
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Anonymous users2024-01-30It should be a 5000mAh power supply, a 5V, 500mA electrical appliance (5V
If the power supply is also 5V, then 5000mA can be discharged for 1 hour, and when discharged with 500mA it can be used for 10 hours.
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Anonymous users2024-01-29Today's mobile phone batteries are generally more than 1000mAh to 2000mAh, and 5000mAh can generally be charged 2 to 3 times.
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Anonymous users2024-01-285000 mAh mWh, if you are 5W, 18500 5x1000 mW = hours.
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Anonymous users2024-01-27For a 5000 mAh power bank, the battery voltage is, then the power is a small fan that consumes power for an hour.
Divided by subtracting the loss of the power bank, it can work for about 7 hours.
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Anonymous users2024-01-26The value is too small to calculate, because you did not specify the voltage of the power bank.
2W mAh power bank, calculated according to 5V, is 20A*5V=100W H, that is, kWh. It is not as good as the loss, and it can theoretically drive 5W electrical appliances 100W H 5W = 20H. That's 20 hours.
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Anonymous users2024-01-25A 20,000 mAh power bank is about equal to the kilowatt-hour of electricity, and it can take about a few hours to drive a 5W electrical appliance.
Calculation method: 1. The calculated voltage of the built-in battery of the power bank: ;
2. The power bank battery is converted into watt-hours;
3. The power bank battery converts 74 1000 kWh of electricity;
4. Calculation of the working time of driving 5W electrical appliances: the output voltage of the power bank is 5V, and it can only drive the electronic equipment with a power supply voltage of 5V. During the output of the power bank, the built-in battery has to go through a step-up process, and there is an energy loss in the step-up process, usually the conversion efficiency is about 85, so as to calculate, the approximate time to drive 5V appliances is:
74 85 5, about 12 5 hours.
Yes, take it out during the security check, don't use it when the plane is in the air, and don't turn on your mobile phone. I've brought 10,000 milliamperes.
1、The power button of the Xiaomi power bank is used to check the remaining power of the power bank,So it is normal for the indicator light to flash after pressing,A few lights indicate how much power is left in the battery,For example, if you turn on 4 lights, it is fully charged; Turning on 2 lights means that the battery level is 50%. >>>More
Nowadays, mobile phones are indispensable items in modern life, whether it is the use of mobile phones to communicate with people, or entertainment games, there is a big challenge to the storage of mobile phones, and power banks have also come into being. During long air flights, many passengers will also bring power banks on the plane. However, due to the attributes of the power bank and the characteristics of the aircraft when flying, when people board the security check, the staff has strict restrictions on the capacity of the power bank, and only the power bank below 10,000 mAh can be brought on the plane. >>>More
As of August 14, 2019, Xiaomi has a 5000 mAh battery with a battery capacity of 5300 mAh. >>>More
Now mobile phones are generally about 4000, and the battery life of 3500 mAh mobile phones should be very average, so it is recommended to choose a mobile phone with better battery life.