The Practical Meter is a small instrument that detects the current of your USB charging interface. It can let you know whether the current of the charging interface is enough and predict the full time of the battery. The design is very simple and practical.
Smart phones play an increasingly important role in our daily life, but different standard USB interfaces will have different charging time, so mastering the charging time of the USB interface will greatly improve your efficiency and better arrange the charging time.
Here is a test example: use the USB interface of the iPhone on the computer to experiment. You can see that the instrument only lights up three lights, about 2.5 watts. According to the test instrument data, it takes 4 hours to turn on the three lights and charge from 0% to 100%.
On the MacBook, the charging interface has 5 watts. At this time, the instrument will light up five lights, representing the highest charging efficiency. At this time, it only takes 1.5 hours to charge from 0% to 100%.
This current meter can also be used on Android.
But in order to better optimize the charging time, they also developed a three in one charging line, which can significantly reduce the charging time. This three in one charging line Love to play computer games Taobao shop also sells it, of course, just a copycat version: 。
This instrument can be applied to all USB charging interfaces, and can test whether its current is enough.
The charging time and the approximate example of the LED indicator light. The higher the LED light, the less the charging time. Note that this icon can only roughly represent the charging time of the iPhone. Other devices can also do a test on their own to know the charging time.
Explanation of working principle.
This is a simple example. When the solar charging panel is used for charging, the charging efficiency will be very low when there is no sun. At this time, it is better to find a place with direct sunlight.
When there is direct sunlight, the charging efficiency will be very high. So with this current meter, you can monitor the charging efficiency of your mobile phone in real time.
The following is the promotional video of this product:
