Sep 26, 2022

Charging time is a cable that takes 6 times in different experiments in different cables.

2018/6/20

Digital life

15センチから3メートルまで長さが異なる同じメーカーのマイクロUSBケーブルを7種類用意した。ケーブルの長さによって、充電時間に違いはあるのか

It takes a long time to charge a smartphone (smartphone) ...In such a case, doubt the cable used for charging.The charging time of the smartphone varies depending on the cable, and the charging time becomes longer when a bad cable is used.How different is the cable?The Nikkei PC21 editorial department, who experimented and confirmed the effect of "Router Relocation" effects in the article "Wi-Fi will be faster in the router location," and confirmed the effect of "Router Relocation".。

充電時間はケーブルで違う　実験で6倍かかる商品も特集　バッテリーの賢い使い方（3）

Measure voltage and electricity for each cable

The power required for charging is determined by the voltage and current when charging.If you have a lot, the charging time will be shorter.In the case of USB terminals used for charging, the voltage is set to 5V by standard.Therefore, the charging time is determined by the size of the current.Recent smartphones support fast charging, but if you use a bad cable, many current will not flow, and even if you use a quick charger, it may be less than normal charging.

The power during charging can be examined by a simple measuring instrument.If you use this, you can find out what differences in the power of charging depending on the cable.Therefore, we collected various types of cables and measured the difference in current.

電圧や電流が多いと、電力が増えるために充電が速い。充電に使うUSB端子の場合、電圧が規格で5Vに定められているため、電流の大小で充電時間が決まる。※クイックチャージやUSB PDなど、電圧を上げることで充電時間を短くできる規格もある

In the cable, a cable with a thick and short cable in general can flow more current.The voltage is not affected by the length of the cable.So I first prepared 7 types of micro USB from the same manufacturer with different lengths, and charged the smartphone "Experia Z5" (Sony Mobile Communications) with a charger.

The cable used for charging is within 1 meter

As a result of the experiment, the current dropped with a cable of 1 meter or more.A 2 -meter or 3 -meter cable is further reduced.Although there is a slight difference in the goodness of the cable, it would be safer not to use a cable of 1 or more for charging.

充電器でスマホ「エクスペリアZ5」を充電したときの最大電圧と最大電流を測定。電圧は変わらないものの、電流はケーブルが1メートル以上だと低下した

Micro USB cables are widely used, so there should be many cables on hand.Some people may use a nearby cable for charging.So I collected cables sold at home appliances retailers and 100 yen shops, and cables attached to the product, and experimented with the charging time depending on the cable.