Modern smartphones offer long-lasting batteries with high capacities that allow the phone to be used for many hours without the need to recharge.
But the additional differentiating feature – and sometimes the decisive one between modern phones – is the fast charging feature, which sometimes promises to charge half the battery in just 3 minutes.
The most important question here is how does this technology fast charging work? Is it really harmful in the long run?
Reports indicate that the inflated sizes of phones and screens forced smartphone manufacturers to inflate the size of the battery, which forced these companies to search for ways to speed up charging these batteries so that phones are practical and fast.
With the rapid development of batteries and chargers, battery manufacturers have set strict controls, such as battery voltage and current entry and exit. The idea of a fast charger is to increase the voltage and current entering the battery.
But the idea of increasing the voltage and current is not done randomly, but rather it is subject to strict restrictions through which the battery charge is divided into two cases: the first is the continuous current, in which almost half of the battery is charged, and the second case is the constant voltage during which the remaining part of the battery is charged.
However, one of the downsides of a fast charger is that it heats up the phone, so the second stage is important in cooling the heat while ensuring that power continues to flow to the smartphone.
The fast charger does not represent any danger to smart devices, because they are programmed not to take more energy than they need, and phone manufacturers specify specific percentages for the number of fast chargers on their phones.
In the long term, fast charging may affect phone batteries due to the heat that is generated during charging, compared to a normal charger.
Today, the charging speed ranges between 15 watt-hours and 65 watt-hours, with charging times between 30 minutes and an hour. Fast charging is not limited to wired charging but also includes wireless charging.