Charger output 5V 1A for mobile phone power how much tile?
So also need an ammeter in series to the circuit, this is more trouble, and to cut their own line.
Only manufacturers know the efficiency of the charger bar, you can also use the power meter to calculate the results of their own efficiency, of course, you have to know the actual output current in order to determine the real-time output power.
Taobao search: Wanfang four generations of WF-D02A power meter about forty or fifty bar, very good use.
The beginning of a large power, the final power is small.
You can use the power meter to measure, very convenient, similar to a conversion socket, with a liquid crystal display, the power meter inserted in the 220V socket, and then your charger inserted in the power meter, you can control the charging power at any time, this is
