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Can I use a 5V 2A charger with a 5V 4A 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.
What is the meaning of 5V 2A charger?
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. The input is a 2A micro-usb to charge.
Can a 12V 3A power supply be used?
If your device states it is 12V 3A, a 3A adapter can handle that load, but so can a 4A and 5A. The higher amperage (amp) power supply will not have to work as hard to handle a smaller load, and will run cooler and more stable.
Is it safe to use a 5V 2A Charger?
Yes you can use that for devices which require that 5V 2A charger, else you should avoid this. Because the 5V 2A charging cable has voltage limit as well as current limit. When the actual current & voltage is more than than, heat will be produced & the cable will be damaged.
What kind of power supply adapter do I Need?
Amperage is the amount of power your device uses. The adapter you order has to be able to supply AT LEAST the amount of Amps your device draws. If your device states it is 12V 3A, a 3A adapter can handle that load, but so can a 4A and 5A.
Which is better 3.13a or 4.16a power supply?
The higher amperage (amp) power supply will not have to work as hard to handle a smaller load, and will run cooler and more stable. If the Amperage of your device is uneven, such as 3.13A or 4.16A, always round up. 3.13A rounds up to a 3.5A adapter, a 4.16A device will round up to a 4.5A or a 5A.