No, it won’t work. If the voltage is too high, the battery will be damaged and, in some cases, will catch fire.
In most cases, plugging in a lower-voltage adapter would not harm the unit. However, if the polarity is reversed, it is likely to cause damage.
Is It Safe to Use a 9V Power Adapter for a 12V Device?
A device may work if it simply takes 12V and immediately feeds it to a voltage regulator that drops it to 5V or lower. In that case, you can probably get away with using as little as 7V.
You can trace the circuit and measure the power rail after the regulator with a voltmeter to see what the device is using. Also, keep in mind that both PWM and Linear regulators require about 2 volts more than the output rail.
Can I Use a 9V Plug on a 12V Device?
It is determined by whether or not your power supply is regulated. If you require regulated (stable) 12V and the 9V supply is unregulated, it may provide up to 14V or slightly higher when not loaded. There is a good chance it will work, but we don’t know for sure.
If you use the wrong voltage plug, your device may not function at all or at optimal levels. There is also the risk of a short circuit. A 208-240 volt electric car charger, for example, can be used on a 120-volt circuit, but it will charge extremely slowly. The charger would need a higher voltage rating circuit to charge effectively.
Can I Use a 9V Power Supply on a 12V Keyboard?
You may be able to turn on the keyboard, but as soon as you begin using it, it will lose power. That shouldn’t be the case. However, your power supply could overheat and burn out. Simply obtain a 12V/2A regulated power supply as soon as possible.
If your device is only rated for a certain voltage, you’ll need an adapter. Remember that older devices are usually rated for specific voltages rather than multi-voltages. If your device requires a different voltage than what a wall receptacle provides, a transformer is required.
Can I Use a 9V Power Supply on a 12V Router?
You are unable to use the supply because it produces more voltage than the original (12v vs. 9v). This has the potential to burn out one or more of the router’s components.
Three things must be the same to swap out chargers:
- The output voltages must be the same.
- The new one’s output amperage must be equal to or greater than the original’s.
- The new adapter must have the same tip polarity as the old one.
What Happens If I Use the Wrong Voltage Adapter?
The device could turn on and simply draw more current from the adapter than it is rated for. As a result, the adapter may overheat or fail. Alternatively, the device may turn on but the adapter may be unable to keep up, causing the voltage to drop.
Voltage is the amount of power supplied by the power supply. The voltage output is critical, and it must be compatible with your new charger. If you have a charger with a 20V output, look for a replacement device with the same voltage. You risk shortening the lifespan of your batteries and device by using different voltages.
What Happens If You Use a Higher-voltage Power Supply?
An AC adapter supplying electricity at a higher voltage than required will cause the connected device to run hotter. Sending power at a higher voltage will also shorten the lifespan of the device and may fry its internal circuits.
Conclusion
Today, in the “digital age,” most devices are designed to operate on a voltage range of 100-240 volts. Even though manufacturers are designing their products to accept multiple voltages, it is still a good idea to check the label or manual of your devices.
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