translation missing: en.general.accessibility.skip_to_content

USB Charger Doctor - In-line Voltage and Current Meter

SKU 2125
Sold out
£7.44 inc VAT
£6.20 ex VAT

The USB charger doctor in-line volatage and current meter is a simple and effective way of checking the voltage and current output from a USB port to another device.

Use the USB charger doctor to measure the working voltage and current output for any USB port and project. This blue plastic dongle plugs between a USB device, and passes the data lines through. There's a 0.05 ohm resistor in line with the power pin that is used to measure current draw. The Doctor's digital display instantly reads the numbers out for testing devices such as chargers, cables, and cell phones.

You can use this device from 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It flips between voltage and current readouts every 3 seconds or so. It's a very handy tool for testing USB devices, checking load levels and debugging battery chargers and boost converters. It's a little chunkier, but more numerical than our USB Power Gauge Mini-Kit. It's also not open source so check out the USB Power Gauge mini kit if you want to hack together your own power gauge indicator.

  • 21mm x 53mm x 15mm / 0.8" x 2.1" x 0.6"
  • USB Plug: 13mm / 0.5"
  • Weight: 16.2g
  • USB 1.x and 2.x - all data speeds. Does not have USB v3 pins so USB v3 connections will automatically downgrade to v2
  • Working Range: 0~3A, 3.5~7VDC
  • Resolution: 10mV / 10mA
  • Operating Temperature: 0-60ºC

Customer Reviews

4.5 Based on 2 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Dennis T.
United Kingdom

Charger Doctor

I bought a Charger Doctor from Cool Components,was pleased with it so ordered another. The second one had a fault,I don't blame Cool Components for this, just pure chance I got a bad one,so I returned it to them. Anyway Cool Components replaced it straight away,and refunded my return postage cost,full marks. I will just add that the replacement worked just fine.

Dennis T. verified customer review of USB Charger Doctor - In-line Voltage and Current Meter
Simon P.
United Kingdom

Cool but not bright

The device is useful, but the display is not very bright. In some conditions it is difficult to see the display