Charging mobile phones is already part of the daily routine and is even often a source of concern, because you have to be aware of it to avoid being disconnected.
In this context, a dilemma arises that may seem trivial at first glance: which should be connected first, the charger or the cell phone?
Seemingly simple, the question sparks debates in online forums and conversations among friends, with opinions divided on what the best practice is, as so far there is no single answer.
Knowing the hidden scientific and technical perspectives behind this question will surely help unravel the "mystery" surrounding the connection sequence in the charging process.
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Which should be connected first, the charger or the cell phone?
To understand the scope of the dilemma, it is first important to know how the charging process works. Devices, such as smartphones, use rechargeable batteries that store the energy they need to fulfill all their functions. Charging is carried out by means of a charger that indirectly supplies it with electrical current.
Connect the charger to electricity first, or to the mobile phone? Opinions divided. Photo: Clarín.
Some advocate the idea of first plugging the charger into the power source (the plug) before doing the same with the device. They argue that this reduces the initial stress on the battery by preventing the flow of energy from being transmitted suddenly. They add that this practice prolongs the life of the battery and also contributes to maintaining its optimal performance over time.
One of the leading manufacturers, Huawei, says: "If you plug the data cable into the phone first, a large impulse is generated at the time of connecting the power supply, and the excess voltage can damage the device. If you plug it into the wall first and then plug in your phone, even though the excess voltage cannot be removed, you can avoid direct contact between the excess voltage and the phone."
On the other hand, there are those who refute them and claim that modern devices are designed to efficiently manage incoming power. In other words, there would be no risk of "stress."
Proponents of plugging the device first say that current batteries are equipped with energy management systems that minimize any negative impacts. They point out that connecting it first can allow for more precise control of the load, thus avoiding current spikes, which improves the efficiency of the process.
Another giant in the market, Samsung, indicates that leaving the charger plugged in after charging does not affect the device. But he recommends following these tips: don't leave the device on a blanket, pillow, or couch; always use original chargers; Avoid using frayed wires or improperly connected plugs and plug adapters.
They recommend not leaving the device on blankets or pillows, using original chargers, and avoiding plug adapters. Photo: StockSnap/Pixabay.
Although still inconclusive results, some studies suggest that the order of connection doesn't matter, while others indicate that connecting the charger first could have long-term benefits.
However, most experts agree that the differences are minimal and that ultimately other factors such as charger quality and ambient temperature play a more significant role in battery health.
Beyond the debate about the order of connection, the quality of the charger used undoubtedly influences the charging process and the longevity of the battery. Low-quality or non-certified chargers can lead to voltage fluctuations that damage the battery over time. In this sense, the choice of a reliable charger can be equally or more crucial than the connection sequence.
Finally, another factor to consider is the ambient temperature during charging. Low or high temperatures can adversely affect the battery, regardless of the connection sequence. Avoiding charging the device in extreme environments and keeping it at moderate temperatures is essential to preserve battery health and maximize battery life.