Engineers might recognize that the voltage x amps number will give you the total wattage of the charger or adapter. Again, these numbers are indicating the rate at which power is sent from the outlet to your electrical device.
Can I use 12V 1.5 A for 12V 2A?
Yes, there will be no problem. As long as the voltage of 12 Volts is same, it will work perfectly fine on a 12 Volt 1 Amp power supply as it would on a 12 Volt 0.17 Amp power supply.
How do I know what power adapter to use?
You might find both the voltage and the current elsewhere on the device, on the bottom or inside a battery compartment cover, or in the manual. Again, look for the polarity by either noting a + or – symbol or the polarity diagram. Remember: the input of the device should be the same as the output of the adapter.
Can I use A 5V 3A charger with A 5V 2A device?
Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.
Can I use A 5V 2A charger 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 1A instead of 500ma?
Yes. That’s perfectly normal. 12V 1A DC power adapter means it can output 12V DC and the maximum current it can provide is 1 Ampere.
Can I use 12V 5A for 12V 2.5 A?
Yes it will work fine. As long as the power supply voltage is within 2 volts and the amperage is equal or greater then you’re fine. Yes, the device will only draw the current required to operate.
How do I know what size power adapter I need?
Typical low voltage adapter sizes. A 5 mm OD x 2 mm ID says the outer diameter is 5mm and the inner is 2mm. If you go into a shop you can compare and test the connector size, or if you are technically minded you can measure the size of the port and pin yourself.
Can I use 1000ma instead of 500ma?
If the device requests 500ma and the power supply can handle up to 1000ma, it’s fine. The device will only draw what it needs and no more. If the device demands more ma than the power supply can deliver, it will force the power supply to deliver it anyway thus frying the power supply.
Can I use 5V adapter for 9V?
No! It might work for few minutes, but eventually the voltage drop on the internal regulator will cause the circuit to overheat and burn.
What happens if you charge a battery with too many amps?
Amperage Provided versus Amperage Required
Device may fail, may run or charge slowly, power supply may overheat, may damage the device being charged — all depending on the magnitude of the difference. The amperage provided by your charger must match or exceed what the device being charged requires.
Is higher or lower amps better?
A higher voltage system is more efficient than a lower voltage since it experiences less energy loss from resistance given the same amount of power draw.
Does more amps mean faster charging?
“Ultimately, it’s really the amperage that determines how fast a charger will supply power to your device. If you want quicker charging, look for a wall or car charger that delivers 2100 mA of current at 5 volts (or whatever voltage the device you’re trying to charge is specced at).”
What is considered a fast charger?
Fast Charging is a term frequently used to market chargers and devices capable of charging faster than the current charging standard (5 Watts). Though there are multiple technologies that enable these fast charging speeds, there is no industry-standard language around them.
Do amps matter when charging a battery?
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.
What does 5vdc mean?
direct current
DC 5V/2A, means that the input voltage, to recharge the battery is 5 volts of direct current. 2A is the amount of amperage that is suggested to recharge the battery. This dose not mean that a transformer of lesser amperage won’t charge it it would just take longe.
Can I use 18V adapter for 12V?
18V would be risky, I would not try to plug a 12V device into an 18V battery. But if you happen to have 18V for whatever reason, you can always use a DC-DC converter. I use car-plug type adapters for all my 12v equipment because they have fuses in them.
Can I use 9V adapter for 12V?
What is this? When a pedal says “9 – 18V”, it means it can accept voltages anywhere within that range. That means you can use a 9V power supply, a 12V supply, or an 18V supply without any problems.
Can I use a 12V 0.5 a adapter with a 12V 1a power rated modem?
No you can’t.
What does 12v 3A mean?
12V 3A means rated supply voltage of that equipment is 12 V and it requires minimum 3 A current to provide rated output.
What do the symbols on power supplies mean?
Power supply
The top symbol is for DC barrel plugs, specifying whether the inside or outside is positive. The middle line is input, where the squiggly tilde ~ indicates AC, here mentioning an input voltage range and frequency it’s okay with (these specs amount to worldwide use).
Contents