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.
The number of watts a radiator uses varies. The device will have a rating printed on it.
Examine your television set; somewhere at the back, you should see how much watts it uses. If it doesn't, look for volts and ampères, and multiply those to get watts. A kilowatt is 1000 watts; a device that uses 1000 watts will use 1 kWh per hour; one that uses 100 watts will use 0.1 kWh per hour, etc.
Yes, the adaptor can supply anything from zero up to 90 watts.
No, the power adapter has to match the power requirement.
Yes, as long as the adapter voltage matches the devices requirement voltage. The capacity of the adapter is more that ample to run the device.
An ipad uses ten watts.
A one amp adapter is the same as a 1000 mA adapter. If your device requires 500 mA to operate then there is ample capacity in the adapter to operate a 500 mA device. Be sure to match the type of voltage AC or DC from the adapter to the driven device. Both have to be the same.
yes, if the other adapter is a va
No, the voltage is too low.