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The exclusive fast charging technologies are ideal for extracting your empty handset, but they have their limits. Power banks do not support proprietary standards, nor do car chargers or multi-device power hubs. If you use one of these models, you will need a compatible phone with one of the most used standards by third party fast chargers. Namely USB Power Delivery and Qualcomm's Quick Charge.
Unfortunately, even when manufacturers support one or more of these standards, it's often impossible to know if you'll get the fastest download speeds or not. This makes the purchase of props a pain. To help you, we test several phones to facilitate these purchasing decisions.
To test, we bought a Tommox 75W USB-C charger, Power Delivery sports, Quick Charge 3.0 and USB 2.4A USB outlets. We also grabbed a 60W USB-C cable, to make sure the cable is not a bottleneck, as well as a USB-C charge level indicator, and started testing phones whose battery was flat.
Best choices for third party charger support
Of all the phones we have tested so far, only three support high load speeds with all third-party fast chargers. These models are the Xiaomi Mi 9, the Nokia 7.1 and the new Samsung Galaxy S10 Plus. All three offer approximately 15 W or more of power with their own charger, USB PD and Quick Charge 3.0.
Many other phones work with all three standards, but certainly not at this speed. As a general rule, the exclusive charger and cable of a phone produce by far the fastest charging results. There are only a few exceptions to this rule, including the Samsung Galaxy S9 + and the Xiaomi Mi 8 Lite.
Another good news is that USB Power Delivery support is more and more common on modern smartphones. More and more manufacturers could support the standard now that they have better control over USB-C. Some handsets also use the Cross Compatibility feature of Qualcomm's Quick Charge 4 standard.
The Xiaomi Mi 9, the Nokia 7.1 and the Samsung Galaxy S10 Plus all offer more than 15 watts of power with their own charger, USB PD and Quick Charge 3.0.
Worst offenders
As we've already explained, OnePlus's Dash and Warp Charge technologies just do not work well with third-party chargers. You will receive nothing more than the basic charging speeds when connecting your OnePlus handset to USB Power Delivery or Quick Charge devices. This is a great example of poorly made patented technology. There is no excuse for this, because faster charging technologies, such as Huawei SuperCharge, are also compatible with third-party protocols.
The strangest phone I have tested so far is the Nubia Red Magic Mars. The phone starts working with USB Power Delivery, but negotiates its own charge, reaching 12V without power consumption. So, plugging the Red Magic Mars into a USB PD port will not charge the phone at all. It is likely that this can be fixed with a software update, because it is an example of a person who blames the application of a standard of load.
LG is by far the worst of the big names tested so far. The Series V charging ports renegotiate and drop power several times, extending charging times. This also makes it very difficult to accurately read the power received by this phone. In this case, Quick Charge works better than Power Delivery.
In general, cost-effective smartphones are more common with third-party fast chargers than more expensive models. Although Honor View 20 and Nokia 7.1 are clear exceptions. Most midrange models offer passable charging speeds from at least a third-party standard. Just check with the manufacturer or our master list to find out which standard is supported.
Complete results
To see the complete dataset, consult the spreadsheet below or click on the link here. Devices receiving less than 10 W of power are not classified in the fast charge, and we estimate that between 10 and 15 W is the minimum we qualify as faster than normal charge speeds. About 15W and above indicates a good implementation of the fast charge, while more than 20W is very fast. The results are color coded for easy identification and help you identify which phones or charging accessories to buy.
We will continue to expand this list as more and more smartphones go through our test suite.
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