Developing smartphone batteries does not seem to keep pace with the rest of the components and reducing the thickness of the devices does not sometimes allow the insertion of larger batteries. That’s why manufacturers try to shift the attention of potential buyers to fast-charging technologies, which can somehow put a strain on the problem.
In essence, it does not matter if the smartphone shuts off after a few hours in standby mode, it’s enough to connect it to a power outlet for half an hour to have a day off. This is at least the one featuring advertising slogans, but XDA wanted to know more, conducting a deeper test on the most popular refilling technologies.
In particular, five were analyzed: Huawei’s Supercharge , OnePlus Dash Charge , Qualcomm Quick Charge 3.0 , Samsung’s Adaptive Fast Charging and USB Power Delivery, the USB-IF standard promoted by Google .
The test was conducted with Huawei Mate 9, OnePlus 3, LG V20, Samsung Galaxy S8 Plus and Google Pixel XL respectively. Due to the different capacities of the batteries, the results were normalized to 3000 mAh, although for general tests data was collected for charging from 5% to 95% of the capacity of each battery. Without going into the technical details and the surveys of the various data that you can find by visiting the source, we summarize the situation for the various technologies examined.
The absolute winner is the OnePlus Dash Charge Technology , which combines very fast charging times (both with the standby device and the device) at a reduced temperature increase with linear performance and fewer shifts. By contrast it is a proprietary standard, which uses high currents, up to 4A, to keep temperatures down. It is therefore necessary to use the dedicated charger and the OnePlus cable provided for home and car, and sometimes it is not easy to find these components.
Huawei Supercharge uses a very similar approach even if in certain conditions it leads to more delicate thermal delta. From the point of view of pure speed is the best but the increase in temperature when charging with a standby device put it behind the OnePlus solution.
The Qualcomm standard, Quick Charge 3.0, stands behind the two solutions described and uses a completely different approach, as it speeds up charging with an increase in voltage rather than current, reaching a maximum of 20V. The advantage of technology is the ease with which power banks, wall and car chargers can be purchased, which comply with the standard and thus allow you to take advantage of fast charging technology at home, in cars and in the office, with purchase costs .
USB Power Delivery, strongly promoted by Google, could make the compatibility of new chargers compulsory with this standard. Again, the performance is lower than OnePlus’s and Huawei’s proprietary solutions, but the standardization of accessories is undoubtedly an advantage.
The most standard is Samsung’s Adaptive Fast Charging , which uses a very conservative approach without exaggerating with tensions and current. The result is a linear charge in any situation, without temperature peaks and large thermal excursions, with a negative peak in charging during use. In this case, the times expands, reaching nearly double the results obtained by the competitors.
The problem, but in this case the documentation provided by Samsung is rather faulty, seems to be linked to turning off quick charging when the screen is turned on. It seems therefore that the solution adopted by the South Korean group is the most conservative. Probably this is a choice to ensure maximum peace of mind from the point of view of security, and it is not said that it is not a smart choice.
And you, what do you think about charging fast? Can it be palliative waiting for new battery-related technologies or will it be the ultimate solution to the problem? The comment box is at your disposal.