Will 12V1A burn with 20V10A power supply?

This will burn 100% ah, the voltage is not the same, it can't be used, and it will burn things directly.

The 12V1A and 12V2A power adapters are not universal.

Because the voltage is certain, the electrical resistance is certain, and according to Ohm's law, the current is certain! And you are using 2A now, because its voltage is 220V, the internal resistance of the appliance will not change, then the current through the appliance is certain, if you use a 12V adapter less than 1A, it may cause the routing to work unstable.

Precautions for the use of the power adapter:

The power supply voltage is the same, but the output current is different, so can it be mixed? The basic principle is that a power supply with a large nominal current can replace a power supply with a small nominal current. The reason is that usually the design of the power adapter has a certain margin, and the load power is less than the power supply, so this replacement is feasible in general use, but the remaining power supply power margin is very small, so it is best not to replace the high-current power supply with a low-current power supply.

There is a nameplate on the power adapter, which indicates the power, input and output voltage and current and other indicators, especially pay attention to the range of input voltage, this is the so-called "travel power adapter", if you go to a country where the mains voltage is only 110V, this feature is very useful, there is no such compatible voltage design, and even only a single input voltage of 110V, which will burn out when plugged in under the 220V mains voltage in our country.

It can't be used, the voltage is too high, it doesn't match, and the current is also very large.

There is indeed a possibility of burning the power supply.

The replacement between different power supplies first needs to meet the voltage, there can be no difference, how big it was, and now it can only be used.

As for the current identification, the power supply is marked with the rated current, that is, the current of the maximum stable output. The actual output current is determined by the electrical equipment, so the new power supply current cannot be less than, but it can be equal to or greater than the original parameters, and there is no problem.

It's definitely okay if the current of these two outputs is a little different, but if the original is 1A, you may not have enough power supply, so it is better to use a larger current according to the previous one, that is, you originally used a 1A charger, then now you had better use the charger, if you use it, the power supply may not be enough.

The load needs 12v1a, which is provided, and it can't be driven at all, and it won't burn.

Won't fry. I've tried both phones. Xiaomi Mi 5s can be charged normally when connected to 9V, and it will jump if it exceeds a certain voltage, Xiaomi Mi 10 Youth Edition 12V can be charged, but the non-protocol charging power will be limited to a very low level, and it can hardly be charged.

It can be universally applied, there is a power supply IC inside the router, the voltage is reduced to 5V 3V, and now the power supply is less than 12V 9V, the IC can work, and the worst case is that the voltage does not reach the trigger condition and does not work, and the router will not be damaged. It can withstand 9V. Theoretically, yes, I once tried the power bank to power the router, and it can be used.

There are DC-DC chips in the router and optical modem, and the input voltage is reduced to 5V or generally used for power amplifiers), as long as the input voltage meets the minimum voltage difference of the chip, a stable 5V or voltage can be generated, and the device can be used normally. If the current is large enough, even if the voltage is only 8V, the router and the optical modem can still work normally, so you need to have an under-voltage protection to prevent irreversible damage to the battery due to excessive discharge.

12V1A uses about 104 kWh of electricity a year.

The 12V1A electrical appliance is turned on all day, and it consumes about 30 kilowatt-hours of electricity for 30 days a month. Then 1 year is about 104 kWh of electricity.

The calculation method of electrical power consumption is that the power of electrical appliances is 12V times 1A is equal to 12W, and the power of 12W times 24h is equal to 288W per day. The power of a month is 288w multiplied by 30 days and is equal to 8640w of a month. Power consumption of 8640 w/1000 is equal to kWh.

So it's about 104 degrees a year.

OK. In the case of the same voltage, a high-power with a low-power load can, and on the contrary, it will burn out the power supply.

Because the current depends on the load. A 12-volt 2-amp appliance is connected to a 12-volt power supply, and the current can only be 2 amps. The 12-volt 10-ampere power supply refers to the current that the power supply itself can output.

A power supply output of 12V10A, connect an electrical appliance rated at 12V1A to the power supply, and it will not burn out the power supply and electrical appliances after powering on.

Because: the voltage of the electrical appliance of 12V1A is equal to the voltage of the power supply (power output 12V10A).

For example, there are several 220V high-power generators, but they only need to output 220V voltage and output power.

KW is different, a household appliance with a low power input of 220V (with equal voltage) will not burn either side.

Electrical appliances are based on the resistance and impedance of voltage, and will not burn out electrical appliances.

Therefore, the power output of a bureau is 12V10A, and a rated 12V1A electrical appliance is connected to the power supply, which will not burn out the equipment after power-on.