KEWEISI Dual USB Power Current Voltage Ampere Meter Tester Portable Current 0-3A & Volt 3-20V Detector Reader Multimeter USB Charger Doctor Digital Display Multifunction Capacity Voltmeter Ampere Meter Current Voltmeter Detector Tester

KEWEISI Dual USB Power Current Voltage Ampere Meter Tester Portable Current 0-3A & Volt 3-20V Detector Reader Multimeter USB Charger Doctor Digital Display Multifunction Capacity Voltmeter Ampere Meter Current Voltmeter Detector Tester

USB input port is plugged in 5V charger, USB output port is connected to mobile phone, directly read the current and voltage parameters
Measuring Micro USB line quality: USB output port is connected to mobile phone, USB input port is plugged in the 5V charger first, remember the voltage, then Micro USB input port is connected to 5V charger, remember the voltage. The smaller the voltage difference, the better the quality of the Micro USB line
Use TP4056 and other linear charging circuit, through this capacity table, to fully charge the battery with completely no power, the capacity data is the battery capacity, and using this method, you can also test the mobile phone charging capacity
Connect this testing tool to portable power source and turn on it. Press the button until the capacity data is zero. Insert the cell phone to charge until the portable power source switches off automatically. The next time you open this testing tool, the display capacity is the portable power source output mAh

Features:

• Fast Charger and safety for use.
• It could be use in number of smart devices, such as Mobile Phone, Tablet
• Function: This test can be USB charging current, voltage, discharge capacity, electric charge, power supply..
• Higher precision than other device.
• It can help you easily find the problem of charging digital devices

Specifications:

• Item name: USB Safety Voltage Current Tester
• 100% brand new, high quality!
• Input / output voltage 3V-20V
• Voltage resolution: 0.01V
• Input / output current: 0A-3A
• Current resolution: 0.01A
• Accuracy: plus or minus 1%
• Ambient temperature: 0-60 (Celsius degree )
• Dimensions: 60*28*15(mm)
• Line loss: about 0.1 ohm
• Test content: voltage, current,
• Weight:36g

Package Include:

• 1 x Dual USB Power Current Voltage Ampere Meter Tester Portable Mini Current 0-3A & Volt 3-20V Detector Reader Multimeter USB Charger Doctor Digital Display Multifunction Tester