How to buy best fast charger for iPhone & Android? (2021)
How do I quickly charge my phone?
Batteries in modern smartphones are getting bigger every year, there are currently no cells on the market that could offer a longer battery life in a smaller size. Batteries with a capacity of 4000-5000 mAh are already present not only in cheap devices, but also in flagships, which affects not only the thickness of the case, but also the charging time.
This is why manufacturers are keen to offer technologies that will charge our smartphones faster. They have both advantages and disadvantages. Let’s take a look at what fast charging standards are worth paying special attention to.
Does fast charging damage the battery?
In theory, the problem is that boost charging is heating up the battery a lot. This can adversely affect its service life, in extreme (extremely rare) situations, damage, or cause a short circuit with ignition.
But, all popular and modern fast charging standards already have built-in protection. One of the most important criteria is to reduce the risk of overheating the energy storage unit by recharging more slowly at the end (eg after 80%). This allows the heat to be dissipated without overloading the element. As a result, we get great durability and safety.
How many amperes do you need for fast charging?
Manufacturers often boast that their chargers have more amperage so they can charge your phone faster. Yes, 1A? 1V = 1W, and more watts can mean faster charging. This is true, but sometimes 25 W (3 A) will produce an effect similar to 40 W (6 A).
It can be assumed that the more amperes and volts, the greater the chances of faster charging. In practice, you also need to pay attention to what technology your hardware supports.
Fast Charging Standards
The biggest issue is not process safety, but the standardization of charging systems. Fortunately, there are initiatives that can change this situation in the future. One of them is USB Power Delivery (USB-PD).
What is USB-PD?
The USB Power Delivery standard is supported by many well-known mobile equipment manufacturers and is often integrated into their own proprietary solutions.
In the latest Delivery 3.0, you can achieve 20V and 5A, which is about 100W. Thanks to this, the standard can even be used to recharge larger devices such as computer monitors or laptops. It is important that Power Delivery technology adjusts the intensity according to the cell’s capabilities, so it will not deliver more energy than the battery can safely accept.
Typically, the Power Delivery standard uses a USB-C connector and is able to efficiently charge both Android phone, iPhone and wireless headphones.
Samsung Adaptive Fast Charging
Samsung’s new flagship smartphones offer support for the Power Delivery 3.0 standard in addition to the classic Adaptive Fast Charging technology. We get fast charging with a standard 25W charger or 45W accessory.
Interestingly, even with the weaker bundled charger, the large 5000 mAh Galaxy S20 Ultra battery, you will have to charge for about 55 minutes from zero to 100%. This is a very good result.
Qualcomm Quick Charge
Qualcomm mobile processors are very popular and are used in many smartphones. One of the advantages of the chips is the ability to use Quick Charge technology.
The latest versions of Quick Charge 4.0 and 4.0+ are capable of delivering 60 or even 100 W (20 V × 5 A, in practice about 4.6 A). They are also compatible with a USB power supply up to 27W (9V × 3A). Here the Dual Charge function is used, which effectively reduces the temperature of the battery and indirectly of the phone, during the process of replenishing the energy.
Quick Charge 4.0+ is supported by devices with Snapdragon 670, 675, 712, 730, 730G, 845, 855, 865 processors. In other words, here you should pay attention not to the phone manufacturer, but to the processor used in it.
It should be noted that the presence of a Qualcomm processor does not exclude the use of other technologies. For example, Xiaomi Mi 10 Pro with Snapdragon 865 processor supports Power Delivery 3.0 standard.
Huawei has long been known for its fast charging technology, but the company recently took it one step further with SuperCharge technology. New models of smartphones, like the Huawei P40 Pro, are available with 40W devices that support the mentioned standard.
It takes less than an hour to fully charge the 4200mAh battery in the P40 Pro using the 40W charger. In reality, you can even reach 50 minutes, but only if you turn off the smart charging function (not recommended). If active, upon reaching 80%, the process slows down so as not to overheat the battery.
OPPO, OnePlus, Vivo, Realme smartphones
All of the above brands are owned by BBK Electronics, which is unknown to most. Nevertheless, in terms of the number of smartphones produced, it is one of the largest manufacturers in the world.
Therefore, it should come as no surprise that its subsidiaries use the same licenses for fast charging technologies. Each brand names differently, may vary slightly, but the standard has the same fundamentals.
OPPO adopts Super VOOC 2.0 fast charging technology up to 65W and VOOC Charging 4.0 up to 30W. OnePlus calls them Warp Charge and Dash Charge respectively, Realme offers Dart and SuperDart, and Vivo boasts Super FlashCharge up to 120W. At the same time, technologies like OnePlus Warp Charge are characterized by higher amperage (for example, 5 V × 6 A).
Apple fast charge
It’s different with Apple products. For example, the iPhone 11 Pro Max using a standard 18W device charges slowly – over 2 hours. However, if we plug it into the MacBook’s Power Delivery charger, which produces more watts, then of course the time will be shorter. Nevertheless, we are talking about a non-standard solution.
Can old phones be charged quickly?
Yes, but older and cheaper smartphones tend to use outdated standards like Quick Charge 2.0 or 3.0 and have weaker chargers. This is why their batteries recharge at a slower rate than the new standard flagships.
The situation can be slightly improved by replacing the standard device with a more powerful one, but compatible with the supported charging technology.
Can I connect another charger?
Yes, but remember that if your phone does not detect a supported standard, then the process itself will most likely be slower. The gadget can, for example, be charged in 5V mode? 1.5 A, i.e. 7.5 W, instead of 10 W. Sometimes it happens that in the absence of compatibility, the process is intermittently interrupted, this also increases the time.
Should you buy universal chargers?
The best idea is to use original chargers from the manufacturer and your smartphone model. However, if you want to speed up the process, then you can take a closer look at other devices, but only if they support the standard used on your smartphone. Amps / watt may be higher.