This problem has plagued mankind since the beginning of the mobile phone. We rely so much on our phones that they rarely get on stream for a day. Many of us join them at night and fall asleep, knowing that we wake up with a fully charged device.
Is it really safe that our phones will stay connected to the charger when fully charged? ? Does it damage the battery ̵
How does a smartphone battery work?
Smartphones rely on lithium-ion batteries. Battery cells have two electrodes, one is graphite and the other is lithium cobalt oxide, and there is a liquid electrolyte between them that allows the lithium ions to move between the electrodes. When charging, they change from positive (lithium cobalt oxide) to negative (graphite), and when unloaded they move in the opposite direction.
Batteries are usually rated in cycles. For example, the iPhone battery 80 should hold% of the original capacity after 500 complete cycles. A charge cycle is simply defined to consume 100% of your battery's capacity, but not necessarily from 100 to zero. You may spend 60% on one day, then charge your phone overnight and spend another 40% the next day to complete a cycle.
You can minimize degradation by treating the battery properly.
Deterioration Over time, and eventually, batteries stop charging, but how fast a battery decomposes depends on several factors. You can minimize the deterioration by treating your battery properly.
What affects the life of a battery?
"Lifespan depends heavily on battery resistance or impedance growth," Yang Shao-Horn, Professor of Energy at WM Keck, Massachusetts Institute of Technology, told Digital Trends. "By fully recharging the battery, the rate of some parasitic reactions is significantly increased, which over time results in potentially high impedance and higher impedance growth."
The same is true for the complete discharge of the battery. Essentially, it speeds up the reactions inside, which reduces it faster. However, fully charging or discharging your battery is far from the only thing that needs to be considered.
"There are so many other factors that affect battery life," said Shao-Horn. "If you increase the temperature, for example, you also increase the parasitic reaction rates."
Too much heat is a major problem because overheating can degrade the liquid electrolyte and accelerate degradation. Another factor that may negatively affect the battery life is the charging speed. There are now many different fast-charging standards, but there may be costs for convenient fast-charging.
"If we increase the charging speed and get faster and faster with charging, the battery life will be shortened," said Shao-Horn.
However, this is more of a problem for electric vehicles and hybrids, which require far more power than telephones.
Should you leave your phone connected to the charger overnight?
Your smartphone detects when it is fully charged and stops the incoming power as it turns itself off, when the lower limit is reached.
"A cell can not be overcharged or overdischarged," said Daniel Abraham, senior scientist at the Argonne Laboratory, on Digital Trends for an earlier article on the Impact of Wire Lower Charging Time for the Battery.
This idea of fully charging or discharging the battery of your smartphone is hampered by the fact that manufacturers set limits. You decide what means fully charged or empty, and they carefully check how far you can charge or discharge the battery of certain height; The battery begins to discharge again and recharges when it falls below a threshold set by the manufacturer. They also increase the amount of time the battery is fully charged, possibly speeding up its deterioration. The magnitude of the impact is difficult to quantify and varies from phone to phone as manufacturers handle energy management differently and use different hardware.
"The quality of the materials used has a big impact on the life of the battery, Abraham said. "You may get what you pay for."
Large manufacturers such as Apple and Samsung offer several tips to extend the life of your battery. However, there is no indication that you should leave your phone connected and charged overnight, or not. We approached Apple and Samsung with this question but have not received an answer yet.
How is your phone optimally charged?
Charging your phone is as low as possible This results in the longest battery life. It is therefore important to learn how to get the most out of your smartphone's battery.
There is general agreement that you should aim to keep the battery of your smartphone between 20% and 80%. Charging during the day is probably better for the life of the battery than charging overnight. It may also be advisable to use the fast-charging system sparingly. A few good wireless chargers at home and at work could be the ideal solution.
What you should avoid
You should try to keep your smartphone as cool as possible, so never leave it in a hot car on the dashboard. Apple recommends removing the iPhone case while charging to reduce the risk of overheating. According to Samsung, it is best not to discharge the battery to below 20%, and indicates that "a complete discharge of the battery on your device can shorten the life" of the generated heat. If you charge overnight, turn off your phone before plugging it in to relieve the battery.
Use high quality accessories.
When charging your smartphone, there is another factor that affects the quality of the accessories used. Always use the charger and cable supplied with your smartphone. Otherwise, you can buy another official charger and cable.
Sometimes the official chargers and cables are expensive. But you can find serious alternatives. However, be sure to look for safe accessories that have been fully tested and certified by Apple and Samsung and that comply with regulatory requirements. When you buy a third-party charger, it's best to stick to big brand names.
It's also important to make sure that the charger and cable you purchased has the right rating. Check the ampere or wattage based on the specifications of your phone. The real risks are at the cheap end of the market. Cheap counterfeits are not made with a view to safety and can be very dangerous. They often do not meet safety standards.
Although it is not ideal if your battery lasts as long as possible, you can connect your phone to the charger overnight without too much risk, unless this is a fake charger, and you leave Do not overheat your phone. For best results when charging your smartphone, please see the following:
- Always use official chargers and cables or certified alternatives from reputable brands and retailers.
- Do not let your phone get too hot. Remove the case when charging overnight.
- To maximize battery life, try keeping the battery between 20% and 80%.
- Do not drain your phone's fully discharged phone while it is charging, consider flying mode, or at least not play a graphically challenging game while it is plugged in.
- Use fast loading only when it is really needed.