Charging speed - amperage
The output current provided by a charger gives us the speed at which the battery will charge, and therefore a 2.4A charger (which is the same as 2400mA) is better than a 2.0A one.
The biggest fear is that if a device came with a 1A charger we could damage it or burn it with a 2.4A one. This cannot happen, since the current indicated in the USB charger is the maximum that the charger can provide, but if the device needs less, it will request less.
The opposite can also happen, that we try to charge a device that came with a 2.4A charger with a 1.0A charger, so what will happen is that the charging will be very slow, but nothing more.
To find out what current the chargers provide, we must look at the engraving where it says "OUTPUT" and look at the number that accompanies the letters "mA" or "A".
USB Quick charge chargers
If the output voltage of the USB charger is highger than 5V, then we must be careful, since we can damage the battery of the device if it is not enabled to accept voltages of more than 5 volts.
To know what the voltage is that the chargers provide, we must also look at the engraving of the charger.
Fast charging types
There are several types of fast charging, although the most popular system is probably Qualcomm's: Quick Charge.
Different versions of Quick Charge change the number of combinations of voltage and amperage supported by the system and incorporate different technologies for greater efficiency and safety. For example:
Quick Charge 1.0: Supports 5V and 2A
Quick Charge 2.0: Add 5V, 9V and 12V and 3A
Quick Charge 3.0: Reduces heating during charging
Quick Charge 4.0: Includes support for USB Power Delivery, as recommended by Google.
Quick Charge Compatible Devices
Not all smartphones are compatible, if an unsupported Smartphone is plugged in, the battery could burn out.
Only iPhones 11, XS, Xr, X and 8 are compatible. But 7 and 6 can be used without any problem. The other models NO. To get to use 100% of the fast charge of iPhones 11, XS, Xr, X and 8, the charger should be USB-C and we should have a USB-C to lightning cable.
On androids phones one way to check if it is compatible would be to go to "Settings - About - Battery" and see the official specification of the device power. Considering that most devices operate at 5V and 1A or 1.5A, any other date higher than this, indicate that it supports some type of fast charging.
On Androids, to use the 100% of the fast charge, the USB charger must be USB-C QUICK CHARGE with USB Type-C cable.
Discover all our products to obtain the maximum speed for charging your devices:
Quick Charge 3.0 USB Charger
USB Type C PD 18W + USB QC 3.0 Charger
USB Type C PD 18W Charger + Lightning to USB-C Cable
USB Type-C to Lightning Cable for iPhone 11