Can I use a 12V 2A power adapter on 12V 3a device?

You will be fine. An adapter that provides less current (1 Amp) is not wise. Use 12V 2A adapter.

Is it OK to use a lower amp power supply?

We recommend higher amperage to ensure cooler power supply and optimal charge time. If you get a charger with amperage less than your original power supply, you risk overheating your charger, burning it and in many case your device will stop functioning and/or charging.

Can I use 2A charger for 1.5 a device?

Yes, as long as you are not trying to charge a 1.5ah battery.. The supply will handle 2.0 amps and the device will only draw what it needs. Surely you can use a 2A charger on a 1.5A Device because it is mostly Volts which can damage your device not Amps, if the Voltage is same of your device than it is OK.

Can I use A 2A power supply for A 1A device?

If you plug a 2A device into a 1A charger, you will only get 1A. The device will charge more slowly (1/2 speed roughly) but everything will be fine. see less It is perfectly safe to plug a device that draws 1A into the 2A port and vice versa. So if you plug a 1A device into a 2A charger, it will still only draw 1A.

Can I use a 5V 2A Adaptor with a 5V 1A device?

If you use 5V 2A for the use of 5V 1A, it will work. There will be a dip in the output voltage if you operate a load of 2.5 A rated value.

Can I use 1.5 amp instead of 1 amp?

No, amps do not have to match, but the power supply or charger must be able to supply enough amps as required by the device being powered or charged.

Can I use a 12V 3A power adapter on 12V devices?

Yes, you can use a 12V 3A power adapter on 12V 1.5A device. You can also use a 12V 0.5A power adapter but the charging time will be three times longer. If you are a cautious person then you should use a manufacturer recommended power adapter.

How much current does a 12V power adapter give to load?

If a DC power adapter has rating of 12v,10A, it will give constant 12v supply to a load connected to it. The current through the load depends on the load and not on the supply. The load takes the current as per the need. In this case, the load is a device of rating 12v,2A. So, it will take only 2A current from the power adapter.

Can I use a 2A power supply to power a device?

The answer is no then yes. Obviously, you can’t power a device that requires 1.5A if the supply will only provide 1.0A. The 2A supply will work just fine. Use the 2A to power your 1.5A device.

Is it safe to use a DC12V to 10A adapter?

Not really, except if the device has no current protection and for some reason shorts circuit. If using the DC12V 2A adapter, the maximum current would be 2A, if using the 10A, the maximum current will be 10A, what may be catastrophic for the device. In general, there is no problem.