ARCELI USB Ammeter & Voltmeter, White, LCD Digital Display, Battery Powered, Modern Style, Voltmeter & Ammeter, 20.0 grams, 3.0-15.0 volts, ELECTRIC_CIRCUIT_TESTING_DEVICE

• Measuring voltage and current: the USB plug is connected to a 5V charger, plug the socket into the mobile phone and other devices, and the voltage and current parameters are read directly.
• Measure the quality of the microUSB cable: connect the mobile phone and other devices, first plug the 5V charger into the plug, remember the voltage, and then plug the micro USB cable of the 5V charger into the microUSB hole of the device to remember the voltage. The better the quality of the microUSB cable, the lower the voltage gap.
• Measure the output capacity and efficiency of the mobile power supply: first connect the mobile power supply to the mobile phone, turn on the mobile phone, press and hold the button until the capacity data returns to zero, and insert the mobile phone several times until the mobile phone works. The power supply is automatically switched off. The display capacity is the mAH of the cellular power the next time the device is turned on
• Data switching: click the button to switch to the next record and double click the button to switch to the previous record.
• Clear data: press and hold the button for more than 3 seconds to clear the group data.

Features: Simultaneous display of voltage, current and mAH data for easy viewing Can detect mobile output power mAH Multiple test records are saved Does not affect data transfer With higher precision, the current parameters do not jump USB plugs and MicroUSB ports are double powered to detect the MicroUSB line quality Current sampling 25 milliohm, less loss With the precise current calibration, the current accuracy is higher (it was calibrated at the time of shipment). Performance parameters: Input voltage: 3V-15V (actually within 15V). Voltage resolution: 0.01 V. Test current: 0.05 A - 3.50 A. Current resolution: 0.01A. Capacity range: 0-19999mAH Accuracy: plus or minus 1%. Cable loss: approx. 0.1 ohm. Test content: battery voltage, current, discharge capacity (total 10 data sets) List: 1 x digital voltage meter