In this era where everyone can't get away from their phones, the battery life of the phone is becoming more and more important, and the advent of fast charging technology greatly reduces the charging time of the phone.
With the advancement of technology, wireless fast charging has been used in many flagship phones like the iPhone 11 Pro, Samsung S20 series, and I Plus 8 series to name a few.
Getting rid of the data cable, how does the phone achieve wireless fast charging? Is it true that the wireless fast charging rumored online will reduce battery life?
Principles of wireless charging for mobile phones
At present, there are four main types of wireless charging: electromagnetic induction, magnetic field resonance, radio wave, and electric field coupled charging, and most of the wireless charging of mobile phones use the principle of electromagnetic induction.
So, let's just get right to the principle of its charging.
Electromagnetic induction wireless charging, the wireless charging of our mobile phones, when the current of the power supply through the coil (the wireless charger's feed coil) will generate a magnetic field, the mobile phone end of the charged coil near this magnetic field will generate current, realize the phone charging.
At present, electromagnetic induction wireless charging has a higher conversion rate than magnetic resonance charging, so it is widely used in the field of wireless charging of mobile phones.
In December 2008, Philips Electronics, Texas Instruments, and other major companies joined hands to form the Wireless Charging Coalition WPC to jointly develop wireless charging standard Qi, Qi is by far the most widely distributed and popular wireless charging standard in the world.
Because of the unified wireless charging standard, as long as it is a Qi protocol, the wireless charging function of the products of different manufacturers can be common.
Qi wireless charging standard uses electromagnetic induction technology, so the biggest problem with this wireless charging standard is the short transmission distance, charging efficiency is easily affected by the position of the placement.
Factors that affect battery lifespan
First, to be clear, wireless fast charging does not reduce battery life. So why do many people think that wireless fast charging will affect battery life?
The biggest benefit of wireless charging is to get rid of the data cable, charge as you go, so there are users who suspect that frequent charging and power failure will reduce the battery life of the phone.
This idea is wrong, now the mobile phone is using a lithium battery, which has no memory effect (nickel-hydrogen battery has a memory effect), "as used as charged" but more conducive to maintaining the activity of lithium battery, that is, do not use low battery, and do not charge too full.
Previously, Apple said that the iPhone's battery can retain up to 80 percent of its original capacity after 500 full charge cycles, and when the battery capacity is less than 80 percent, power consumption will accelerate and performance will be affected.
A single charge cycle of a phone is the number of times the battery is charged from fully charged to fully depleted, not the number of charges.
What conditions can cause battery loss?
1. wrong charging habits. Smartphones use mostly lithium batteries, of which lithium ions have some activity, if the phone is over-discharged, it will certainly affect the battery life.
So, try not to start charging the phone when it enters "low battery mode", and at the same time, try not to play large games and other power-hungry, high-calorie operations when the phone is fast charging.
2. The battery temperature is too high. The lithium battery is the most feared irreversible damage caused by high temperature, the normal operating temperature of the general mobile phone is between 0~40 ℃, too high or too low temperature, will cause a certain degree of damage to the battery.
3. Substandard charging equipment. Using unqualified third-party chargers and data cables without over-voltage and over-current protection can cause unstable charging power and damage to the battery core.
Examples of models that support wireless fast charging technology
At present, the biggest drawback of wireless charging technology is that the temperature is too high, mobile phone manufacturers are also solving this problem, domestic flash memory technology like OPPO is very good.
On April 13, the OPPO Ace2 was released online, and the new machine comes with a 65W wired + 40W wireless fast charging + 10W reverse wireless charging combination.
Its 40W wireless flash technology, the fastest in mass production, is faster than most wired fast charging on the market, taking wireless fast charging to a new level.
It adopts a two-cell architecture in series, which only requires the charging base - receiving coil to step down the voltage once, which makes charging more efficient and generates less heat.
In addition, the wireless charging pad is equipped with air-cooled cooling to keep the back temperature below 40 °C while charging, and the charger is compatible with mainstream Qi charging standards, allowing it to charge other devices that support wireless charging.
Others like the Samsung S20 series, Iga 8 Pro, Huawei P40 series, and Xiaomi 10 series to name a few, all support wireless charging, although the charging power varies, but is always playing a leading role in the industry.
Wireless charging gets rid of the data cable, the right way to charge + technological innovations without worrying about battery loss, and most importantly, charging as you go.
For commuters, using fragmentation time is a quick and easy way to replenish power.
The future is bound to be a wireless world, and just like wired fast charging, I believe wireless fast charging will slowly become popular.