Is wireless charging harmful to a fully charged smartphone?

Today, nearly 80 models, from Audi, Chevy and Kia to Hyundai, Nissan and BMW, offer in cabin wireless charging based on electromagnetic Qi charging specifications. According to the entity wireless power alliance (WPC), which is responsible for Qi standards, there are more than 5000 public Qi charging locations around the world. Other major brands such as McDonald's, Marriott and Ibis have incorporated Qi into their properties. London Heathrow airport, Philadelphia and other airports around the world have Qi charging stations. Companies like Facebook, Google, Deloitte, PwC and Cisco have incorporated Qi into their corporate offices.

In the past few years, one of the main reasons for [manufacturer's] delays in introducing wireless charging solutions, especially in the in car market, has been waiting to find out which standard Apple might choose for its wireless enabled iPhone. Now that Apple has decided to use the Qi standard, the number of transmitters coming into the in-flight market is likely to surge.

Whether in terms of quantity or technology choice, consumers' demand for wireless charging in offices and public places is largely driven by the adoption of devices in the mobile phone market. Therefore, since Apple has chosen to use Qi's wireless charging standard, it makes it easier for charger providers in public infrastructure to provide charging solutions for the device.

So, is wireless charging bad for a fully charged smartphone? With wireless technology, it's easier to charge, and the question becomes: is it harmful for a mobile device to have a full battery all the time?

When the battery is charged, the positive electrode will release lithium ion, which will move to the negative electrode and store it as energy. As the battery discharges, these ions move back to the positive electrode to be used as electricity. As those lithium ions move back and forth, the electrolyte, which acts as a transport medium, degrades over time. The higher the charge state, the faster the degradation rate of electrolyte. Therefore, the wireless charging of mobile phone not only keeps the power below its maximum power, but also makes the charging and discharging pendulum not swing violently.

"Overall, if you swing the battery charge from top to bottom, it's the worst thing in the life of the battery. If you can cycle the battery between 45% and 55%, that would be the best choice. " Experts said. "But in general, just make sure you don't charge it fully."

However, don't be too sensitive to charging your smartphone or tablet. Most smartphone manufacturers design batteries that last two to three years, so if you're a consumer who usually changes your phone after that time, you don't have to worry too much about the charging rate. Ifixit engineers say wireless chargers can not only make the battery fully charged, thus extending its service life, but also reduce the mechanical wear of the charging port. Regardless of charging habits, the battery is consumable and should be replaceable. Is wireless charging harmful to a fully charged smartphone? "The issue," the debate will continue, with talk of whether to keep these batteries fully charged as more and more lithium-ion batteries are on the market in consumer electronics and electric vehicles.

However, mobile phones are an investment. There are more important things to worry about in the world than the increased cost of new batteries.