These USB in-line voltage and current meters with OLED display are a lot like the Charger Doctor we carry. Just like the Charger Doctor, you can use this meter to check if your voltage is too low or your current draw is too high.
This voltage meter has an OLED display that shows off voltage, watts, amps, and mAH and instantly reads the numbers out for testing devices such as chargers, cables, and cell phones. There's a button on the back that allows you to flip the display 180° for easier reading.
This USB voltmeter can be used from 3.7 - 13VDC input voltage and up to 3A current (though USB voltages normally move between 4.5 and 5.5VDC at most).
- Dimensions: 47mm x 22mm x 11mm (w/o USB plug)
- Weight: 12g
- USB 1.x/2.x compatible
- Voltage range: 3.7 - 13VDC
- Current range: 0 - 3A
- Resolution: 10mV / 10mA
- Accuracy: +- 0.5%