Vehicle wireless charging cradle, charging speed up to 2.8 times slower at high temperatures

Provided by Korea Consumer Agency

A study found that the charging speed of smartphones slowed down when the wireless charging cradle for vehicles is used in a high-temperature environment. The Korea Consumer Agency announced on the 8th that this was the result of evaluating 10 wireless charging cradles for vehicles sold on the market.

The evaluation products are Nabi (NV29-CWC15Q), Duzon (TZ-C100), Mando (MD20), Mayton (Gogoong ver. A300), OA (Wider P), Joppajib (CWC02), and KM Motors (Chungzal).

According to the Consumer Agency, as a result of investigating the time it takes to complete charging after discharging the smartphone (Galaxy S21) for these products, it takes 2 hours 15 minutes to 2 hours 29 minutes at room temperature (20 degrees Celsius), so the difference between the products is up to 14. It wasn’t as big as a minute.

However, the charging time increased from 4 hours 30 minutes to 6 hours 13 minutes under the condition that the temperature rose to 30 degrees due to the operation of the vehicle heater. According to the Consumer Agency, the charging time has increased from a minimum of 1.9 times to a maximum of 2.8 times compared to at room temperature.

All 10 products had no abnormality in safety, such as the amount of electromagnetic waves. However, it did not meet all of the standards for Qi certification, the international standard for wireless charging. The Qi standard is an international standard for magnetic induction wireless charging established by the Wireless Power Committee, and is not a compulsory standard.

The Consumer Agency investigated whether the output voltage could be sent to the smartphone for 10 products and the performance of detecting conductive foreign substances between the smartphone and the cradle, all of which did not meet the standards.

Six products, including Mayton, Shinjimoru, I-Navi, iriver, OA, and KM Motors, did not indicate as cautions that the charging speed may be slowed down at high temperatures or the foreign substance detection performance may be insufficient. The Consumer Agency recommended improvement of labeling to six companies, and all said that they plan to display cautions in accordance with the recommendations.

Reference-www.khan.co.kr

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