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It really is not safe to leave a AC adapter plugged in. If not using I would unplug it.

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11y ago

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Can you use a 3.7v AC adapter for an LED light that recommends a 4V adapter?

You will be undervolting the LED by .3V, but otherwise it should work ok. Note the LED will not be quite as bright as it would be with 4V, but 0.3V isn't much to worry about. Also, make sure the adapter has the current capacity for the LEDs. If the LED draws more current than the supply can put out, it will not work and may burn up the adapter.


What happens when a volcano erupts from the cone?

Idk im kinda dumb......... Stuff just happens ok? So leave me alone poopface


What was Carl Linnaeus nationality?

He is a Pilipino, ok ok ok ok ok ok ok..........


What if your electric heater is rated 5 amps it is plugged into a 111 volt outlet how much power is generated?

OK. First, note that your heater doesn't 'generate' power. If it did, you could sell the power. Your heater consumes power. The electric company generates it, and you pay them for it. The power consumed on a household circuit is nominally (Voltage) multiplied by (Current). The voltage delivered to your house is nominally 117 volts AC, although it can vary by a bit. If the current through the heater is exactly 5 Amp, then the power is (117 x 5) = 585 watts, or 0.585 KW.


Is it ok to leave your power amp on all the time?

It is generally not recommended to leave your power amp on all the time as it can lead to unnecessary wear and tear, increase energy consumption, and shorten the lifespan of the device. It is more energy-efficient and better for the longevity of the equipment to turn it off when not in use.

Related Questions

Ac Adapter is it ok to use higher voltage?

On both the primary side and the secondary side the answer is no. It's OK if the voltage is within 10% of your original AC Adapter.


Ac adapter is it ok to use lower voltage 19v 4.74a ac adapter has died. Can I use a spare I have in the mean time it's output is 12v and 5a?

not unless you want to fry your electronics


Is it ok to use a 4.5v 800mA AC adapter for a device when the original adapter is supposed to be 4.5V 500mA - will it damage the device?

Yes. As long as the voltage is the same which it is. The 800mA is the capacity that the transformer can produce safely without going into an overload state. Your original adapter was rated at 500mA which means that what ever device was plugged into it draws less that 500mA. You might notice that the new adapter is slightly physically larger. So you are safe to use the new adapter with the higher rating.


Is it ok to use a 4.5V or 6V from a universal ac adapter 1300ma for device that requires 5V dc?

yes, depends on equipment..


Is it ok to use a 8V 650mA AC adapter for a cordless phone when the original adapter is supposed to be 9V 500mA When you plug it in with this adapter and it appears to be working?

It may work,but the phone device will be underpowered and it may not function to its full potential,like range,signal clarity. But on the other hand,your adapter will be overloaded and may heat up,leading to a short life. Rajiv Modi


Can you use a 3.7v AC adapter for an LED light that recommends a 4V adapter?

You will be undervolting the LED by .3V, but otherwise it should work ok. Note the LED will not be quite as bright as it would be with 4V, but 0.3V isn't much to worry about. Also, make sure the adapter has the current capacity for the LEDs. If the LED draws more current than the supply can put out, it will not work and may burn up the adapter.


What voltage is the Thailand national grid on?

220v ac UK and Europeans will need an adapter, but otherwise ok. US will need a converter.


Will a 5V 2.5A adapter damage a device that requires a 6V 2A adapter?

No, underpowering will not "power" the device, it will not run. You must get an adapter that is 6V and (2A or higher) will be ok as well.


1997 ford escort rough idle when warmed up but ok if AC on full blast What is problem?

When the AC is on most vehicles increase the idle speed. That can often mask the problems that cause rough idle. The primary suspects are: EGR valve, tune-up, sticky or plugged injectors and valves.


Is it ok to use a 5v 1A AC adapter for a device when the original adapter is supposed to be 5V 500mA - will it damage the device?

Yes - what matters is the voltage - it has to be the same. The device will only draws 1A as needed - the adaptor with higher amp,i.e, 2A is fine. As long as the adaptor has amps equal to or greater than those of the device, it will be ok!


Write notes of the Display adapter?

That question doesn't make any sense. Are you asking if it's ok to write notes ON the display adapter? I wouldn't do that.


If the output current is 3.9A on a 19.5V ac adapter can this adapter be replaced with a new ac adapter with an output of 4.7A current on a 19.5V adapter?

Don't count on it. Your 18 watt device should be matched with the proper AC adapter. You cannot rely on the device to resist and limit a supply voltage more than 50% beyond its rated capacity. You wouldn't try to run a 110 volt electric shaver from a 220 volt receptacle, would you? If you try to purchase a fixed or universal (adjustable voltage) adapter you must also be concerned to match the polarity where the two meet. Some electronic devices are sensitive to mismatched polarity and will fail. Your best bet is to contact the manufacturer of the device to purchase a replacement ac adapter. outside of improper polarity (assuming dc here, ac doesn't matter), if the VOLTAGE OUTPUT of the adaptor matches the INPUT VOLTAGE of the device it is powering, all is ok. as long as the current (milliampre rating) of the adaptor is equal to or exceeds the current rating of the device, all is ok. wattage is equal to voltage X amperes ... hence one cannot use the wattage rating of an ac adaptor to determine if it is is correct to use on a given device. Perhaps. If the two devices accept the same range of voltages, the polarity is correct (although AC circuits do not care about polarity, reversed polarity is a serious safety hazard), and the power adapter to be used can provide at least the amount of current required by the device in question, then yes. If the adapter is not rated to sufficient current, the device may or may not function -- the current will still be provided, but the supply voltage will drop. The power supply will generate additional heat. A voltage mismatch may destroy the device. Mismatched polarity for a device requiring DC power will not work and may damage the device. Mismatched polarity for a device requiring AC power will work, but may present a shock hazard, as many cases are connected to the neutral wire. Reversing the polarity will cause the case to be wired to 120V.