Understanding the Differences Between QC 3.0 Chargers with 2.4A and 3A Outputs
The primary difference between a Quick Charge QC 3.0 charger with a 2.4A output and one with a 3A output lies in their maximum current output capabilities. Here is a breakdown of the differences:
Current Output
QC 3.0 with 2.4A:
This charger can deliver a maximum of 2.4 amps of current to the device. This is typically sufficient for most smartphones and smaller devices.QC 3.0 with 3A:
This charger can provide up to 3 amps of current. This higher output can charge compatible devices faster, especially those that support higher charging speeds.Charging Speed
Both chargers utilize QC 3.0 technology which allows for variable voltage levels from 3.6V to 12V. However, the higher current output of the 3A charger can generally charge compatible devices faster. This is particularly beneficial for larger devices like tablets or newer smartphones that can handle higher charging speeds. This can be calculated using the formula: watts volts x amps. For example, 9 volts x 2 amps is 18 watts of power, and 12 volts x 2 amps is 24 watts.
Device Compatibility
Both chargers are designed to work with devices that support Quick Charge 3.0. However, devices that are specifically designed to take advantage of the higher current output (like those that support 3A charging) will experience faster charging times with the 3A charger. For standard devices that do not require high power, both chargers will perform adequately.
Heat Generation
Higher current output can lead to more heat generation during charging. This is typically managed by the device and charger, but it’s something to consider, especially if the charger or device does not have good thermal management.
Conclusion
In summary, if you have a device that supports higher charging rates, the QC 3.0 charger with 3A output will offer faster charging compared to the 2.4A version. However, for standard devices that do not require high power, both chargers will perform adequately. Always ensure that your device is compatible with the charger’s output to avoid any potential issues.
The wise move for Android owners today is to buy a QC4 power supply AC adapter instead of a USB Type C PD adapter, even though the latter is becoming the standard. QC4 is backward compatible to QC 2 and QC 3 and meets the latest USB C PD 3.0 PPS specification.
What if You Have Legacy Devices?
How can an Android owner charge legacy devices with a C port? The QC4 adapter recognizes the device and outputs precisely what is required in voltage and amps. Using a C to C cable, you can charge new and old devices. You simply put a tiny adapter tip on the end of your C cable so it will fit the micro B port on legacy devices. Use a tether so it doesn’t get lost. No more toting around a bulky Type A cable or a legacy adapter to charge legacy devices, including battery banks, phones, and flashlights.
QC4 adapters will always be equal to or in most cases better quality than a USB Type C power delivery adapter. QC4 is particularly good for older power banks with micro B input, as it can charge them at the fastest design rate, something not possible with QC 3. QC4 has better temperature control, potentially resulting in longer life for device batteries. Personally, I am realizing a cooler Android smartphone during charging, which also charges faster than with other adapters. A smarter adapter means no worry over compatibility.