Description
USB Doctor USB Voltmeter and Ammeter
This inline USB meter measures voltage and current to help check USB chargers, power banks and devices while charging. It can monitor a phone or battery during charging and show the USB output voltage and the current drawn by the connected device. It is also used by smartphone repair technicians when troubleshooting charging problems. The listing says it supports USB sources such as a computer, wall charger or car charger.
Specifications
- Voltage measurement range: 3–7.5 V
- Current measurement range: 0–3 A
- Resolution: 0.01 V and 0.01 A
- Measurement accuracy: voltage < ±1%; current < ±2%
- Full-scale voltage drop: 0.2 V
- Operating temperature: 0–60°C
- Dimensions: 53 × 35 × 14 mm
Range note: The source excerpt says 3.5–7 V, while its specification list says 3–7.5 V. The range above follows the detailed specification list.
Keywords: USB tester, USB Doctor, voltmeter, ammeter, multimeter, power bank.
