do ac adapters draw power?
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Plug-in adapters. Some of them draw some current even when the device they're powering is turned off (or in the case of chargers, even when the phone or device is fully charged). If the adapter is warm even when the device is off, it's wasting a little electricity, but usually not much.
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Safety tip: When you use a power board or double adaptor, each device plugged in creates a new parallel circuit, but the total current for all of the devices must flow in the one house circuit.
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The Nintendo Switch AC Adapter uses USB Power Delivery over USB Type-C to provide 7.5 watts (5 volts @ 1.5 amps) and 39 watts (15 volts @ 2.6 amps) of charging to the Switch Console.
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converters. The big difference between an adapter and a converter is electricity. While the purpose of an adapter is to simply help the plugs on your electronics fit into (or more aptly, adapt to the shape of) foreign outlets, a converter's job is to change the voltage found in an outlet to match that of your devices.
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4 Answers. The way Apple power adapters are designed is that you can use any charger on any laptop that has the same, or lower, power rating. For example, you can safely use an 85W power adapter (for MacBook Pro) on a MacBook Air (which requires only 45W) or MacBook (which requires 65W).
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It is used in mobile phones, batteries, electric cars, etc. Power adapter also turns AC into direct current. Now the mobile charger on the market is also generally switching power supply. Switching power supply is more widely used, such as massager, hair straightener, LCD monitor, notebook computer and so on......
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The big difference between an adapter and a converter is electricity. While the purpose of an adapter is to simply help the plugs on your electronics fit into (or more aptly, adapt to the shape of) foreign outlets, a converter's job is to change the voltage found in an outlet to match that of your devices.
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Bad AC power adapter You can determine whether you have a bad adapter by charging your PSP 3000 using a functional adapter. If your PSP accepts a charge then you need to replace your power adapter. If the same problem occurs with a different power adapter then your device could be bricked or have a bad battery.
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Most GoPros use 5V / 1A, which is standard for most AC adapters. The HERO7, HERO6, and HERO5 models can take up to 5V / 2A. You can use a standard USB wall charger. If you don't have the one that came with your camera handy (or if it didn't come with one), the one you use for your phone or tablet will most likely work.
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AC-DC converters are electrical circuits that transform alternating current (AC) input into direct current (DC) output. They are used in power electronic applications where the power input a 50 Hz or 60 Hz sine-wave AC voltage that requires power conversion for a DC output.
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Apparently even new chargers consume a bit of electricity when they are plugged in - but it amounts to just a few pence a year. The amount they use while not attached to the appliance is limited by EU regulations to no more than 0.5 watts.
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2 Answers. No, but you can find universal laptop chargers online that are pretty cheap. Look for one that has the same power rating as your current charger (i.e. 60W, 90W, etc.) and one that has a tip that matches the one you've got from Asus and you're all set.
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The Japanese electricity supply is an unusual 100V AC. Appliances with a two-pin plug made for use in North America will work without an adaptor, but may be a bit sluggish. Tokyo and eastern Japan are on 50Hz, and western Japan, including Nagoya, Kyoto and Osaka, is on 60Hz.
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The AC power adapter is used to recharge the battery in a notebook computer and to provide dependable power for operating the notebook for long periods of time. If an AC power adapter fails, it will not recharge the battery and it will not provide power to operate the notebook without a battery.
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If the power supply can supply more than 2.1Amps this doesn't matter as the product will only take 2.1Amps. If the power supply can only supply 1 Amp in this case then either the product will fail to work/charge or charge slowly as it can't get enough current (or power) to charge the battery.
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Plugging in Your Air Conditioner Most room air conditioners can be plugged into a standard 110V 15- or 20-amp circuit as long as it's not shared with any other major appliance. Larger 7.5-amp units need their own dedicated circuit.
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When a laptop is plugged in and turned on, you will notice the adapter may be warm to the touch. A relatively warm power adapter is normal, especially when the laptop is in use while the battery is charging. ... If you notice the adapter is extremely hot, turn off your computer and unplug it from the wall outlet.