Battery life has become a major concern for smartphone users due to the increased reliance on phones for almost all daily tasks, so the feature of long battery life has become one of the main features that the average buyer is looking for after the screen size.

 According to a study conducted by Kantar during the third quarter of 2019, battery life is more important than a powerful camera, and battery life and the way to deal with it also affects the shelf life of your device.

 Also, the increased focus on battery life is one of the reasons that helped spread fast charging devices everywhere; because the phone battery will not last for a full working day except in the case of moderate use, but if you use it frequently, you will need to recharge it more than once, and here you can  Fast charging helps you get 50% charge in just 10 minutes.

 The feature of fast charging has become increasingly common especially in the leading phones, as almost all the leading Samsung phones include this feature, as is the case with Huawei, Google, and OnePlus, and so far Apple has supported this feature in its latest phones.

 Now that fast charging has become a common feature in phones, many questions have arisen such as: What is the effect of the high capacity charger on the phone battery, and can fast charging weaken the battery's ability to store energy over time?  Does leaving the charger on the phone for extended periods of time may lead to overcharging?  How can I extend battery life?

 Therefore, today we will review the answers of some researchers and engineers in the field of batteries about the effects of fast charging on the battery life of phones:

 1- Phone batteries will not change any time soon:

 All mobile phones - and most personal electronics and electric cars - use rechargeable li-ion batteries.  It is difficult to create batteries that last longer because battery technology has not changed for decades.

 Instead, much of the recent progress in battery life has come in the form of incorporating energy-saving features into devices, enabling the operating system to manage charging and discharging in a more efficient way.

 Also, the size of phone batteries is an obstacle to prolonging their life, because when you compare the phone battery with the electric car battery, the phone power source is much less.  For example: The Tesla 3 rechargeable battery has a battery capacity 4,000 times larger than the iPhone 11 Pro Max.  The process becomes somewhat complicated since phone batteries are measured in milliampere-hours / hour, while electric vehicle batteries are measured in watts / hour.

 This is important because the larger the battery capacity, the more energy-saving tricks to extend its life.  For example: as the battery is charged, the difference in voltage (voltages) increases, which leads to fatigue of the battery, especially during the last 20% of the charge.  To avoid this stress, electric car manufacturers may introduce new batteries that charge only 80%.  Because of this large capacity of the battery, the electric vehicle can still travel an acceptable distance while avoiding high-voltage stress.  This can double the overall life of the car battery.

 Larger phone batteries can run all day, but usually have a 100% charge, and although this allows the battery to last an acceptable period of time between charges, it also puts the battery under greater stress than the high voltage difference.

 2- Fast charging does not damage your phone's battery:

 A conventional charger delivers power from 5 to 10 watts, and a faster charger can improve this by up to eight times.  For example: iPhone 11 Pro and iPhone Pro Max come with a fast 18-watt charger, while Galaxy Note 10 and Note 10 Plus come with 25-watt chargers.

 Accordingly, the use of the quick charger will not cause any harm to your phone's battery even in the long term, unless there are any technical defects in the battery or the charger.

 The reason for this is because the batteries that support fast charging operate in two stages; the first stage adds a rapid voltage to the empty battery that saves about 50 to 70% of the charge in the first 10, 15 or 30 minutes, because during the first stage of charging  Batteries can quickly accept charging without any major negative impacts on their long-term life.  In the second stage of charging, the charging speed must be slowed and managed carefully, otherwise the charging process may cause damage to the battery.

 Therefore, the battery management system closely monitors the charging stages and reduces the charging speed during the second stage to give the battery time to accept charging and avoid problems, which is why it may take 10 minutes for a 100% charge.  Also damage is very rare if everything inside is well managed.

 3- The battery cannot be charged excessively:

 The fear of (overcharging) the battery always causes concern among phone users.  This is because of the belief that keeping the phone connected continuously can charge the battery more than its capacity, which makes it unstable, and may lead to a deterioration in its shelf life, or an increase in its internal temperature leading to its explosion or ignition.

 According to experts, the modern battery management system is designed to stop electric charging once it reaches a 100% charge rate before it reaches the phase of overcharging.

 "Unless something goes wrong in the battery circuit, it will not reach the overcharge stage because it has built-in protection to prevent this from happening," Venkat Srinivasan, a battery researcher at Argonne National Laboratory, told the Cnet technical site.

 Apple is following a smart approach to this issue in iOS 13, which is if you leave the iPhone for long periods in the charger during the day or leave it overnight, you can turn on the battery setting named (Optimized Battery Charging) as it will monitor the charging time and maintain a charge rate of up to 80  Only%, which avoids the battery the risk of high voltage difference, then raises the charge to 100% before a period of taking the phone off of charging, and this setting works best for people who have a regular charging pattern, as the iPhone battery will be charged 100% without damage in the term  the long.

 4- Do not leave the battery to zero:

 You may want to allow your phone's battery to fully disconnect to reset its charge status, but unfortunately modern phone batteries have evolved and no longer need this process.  Discharging the battery all the time can lead to chemical reactions that can shorten battery life over time.

 To avoid completely discharging the battery, the battery management system includes safety features that turn off the phone when it reaches a low power level.  And if you want to extend battery life, plug your phone in when the charge reaches 30%, which is much higher than the low battery levels.

 5- High temperature may damage the battery:

 Heat is the real enemy of the battery; high temperatures are known to decrease battery life over time.  So you should keep your phone away from strong sunlight, window openings, and the dashboard of your car, to prevent overheating that causes battery efficiency to decrease over time, and in extreme cases it can explode a battery which is a rare, but potentially dangerous, risk.

 6- Chargers and cables compatible with the phone will not damage the battery:

 Unless imitated or damaged chargers and cables are used, the use of cables and chargers compatible with the phone will not harm the battery.  However, it may not charge as fast as the original charger supplied with your device.

 Some phones such as: Huawei phones and (OnePlus) also use a special charger, as the company includes the part of the departments responsible for fast charging in the charger, so to take full advantage of fast charging it is necessary to use the charger supplied with the phone.

 Finally, how do you keep extending your phone's battery life?

 To extend battery life, you can use the usual energy-saving tricks, such as: reducing screen brightness, turning off (Bluetooth) and (Wi-Fi) when not in use, restricting background data usage through settings, and monitoring apps that use  GPS.

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