As Apple’s latest accessory line, MagSafe charger, which can support up to 15W wireless charging, has also become the most suitable accessory for the iPhone 12 series. The double wireless charging speed and convenient use mode make it a purchase choice for many consumers. The popularity can be seen from the arrival time of the official website. However, after various tests, it is found that the charging speed of MagSafe charger is difficult to reach the official 15W due to various harsh conditions. This may be one of the reasons why consumers wait-and-see; moreover, you tube pointed out that only the official 20W charger can reach the 15W wireless charging speed advocated by apple. < / P > < p > with doubts, we also measured the charging speed of MagSafe. The results show that YouTuber’s conclusion is wrong, but MagSafe charging speed is greatly affected by the body temperature. < / P > < p > the last two chargers cannot reach the normal charging speed due to the hot body. The lax part of this test method is that after a charge, the iPhone continues to be recharged for a second time when the fuselage does not return to normal temperature. < / P > < p > under different temperature conditions, the charging speed is often different. Therefore, it is concluded that “except the official 20W, other chargers can not reach the MagSafe peak 15W charging speed”. < / P > < p > after adjustment, we kept the iPhone 12 battery at 45% and left the device idle for 5 minutes after each charger test to ensure that the iPhone 12 is maintained at the same temperature and charge state. The results are as follows. < / P > < p > the time when the power reaches 9W is about 15 seconds, and the charger needs a certain “handshake” time. After staying in the range of 9w-10w for a period of time, the charging speed will exceed 10W in about 37s and reach 15w-17w in about 1min. During the test, we found that the charging speed can reach 18.8w, but the duration is only about half a minute, which is also related to the residual power of the equipment. The test results show that only 20W (9V / 2.22a) charger can support 15W power, and the charger with 18W (9V / 2a) power may not reach the peak value. As the only 18W charger tested, uibi charger failed to reach 15W charging power after two tests. < / P > < p > overheating of the fuselage does affect the charging power of MagSafe. At the beginning of the test, when we only felt that the fuselage was slightly warm, but the charging power could not exceed 10W, the temperature control was almost harsh. Therefore, when charging with MagSafe, please make sure that the fuselage is not heated. < / P > < p > in the continuous charging process, the heat brought by the wireless charger may also affect the charging speed. MagSafe can hardly maintain the charging power of 15W all the time. After continuous charging for a period of time, it often drops to 9W or even lower. < / P > < p > if you value MagSafe’s charging speed, it is recommended to wait and see for a while before making a purchase decision. The charger supports firmware upgrade, which may be updated in later versions to enhance the stability of charging speed. [image] Google secretly tests 6GHz networks in 17 states of the United States