USB Voltmeter Ammeter Power Tester KWS-V21 USB Tester Power Capacity Mobile Power Testing Tool

Price: £7.89
(as of Nov 06,2024 00:55:42 UTC – 【RESET BUTTON DESIGN】: USB power tester has designed with reset button, and you can press 3-5 seconds to make the screen cleared, and this USB Voltmeter Ammeter can bring you good using experience.
【REAL-TIME TESTING】: USB power tester can measure USB charging voltage, current and discharge capacity over time, which is 100% brand new and has high quality assurance.
【MEMORY FUNCTION】: USB power tester support empty display with memory function after power off, and the power tester can be used to check the performance of USB cables, wall chargers, car chargers and power banks.
【FAST CHARGER AVALIABLE】: USB power tester is compatible with fast-charger, which can work under up to 20V, and the power tester does not interfere with fast charge negotiation, will be good helper to you.
【AFTER SALE SERVICE】: If you have any questions about this USB power tester, please feel free to contact us immediately,and we will serve you wholeheartedly.
)

Reviewer: jintymac
Rating: 5.0 out of 5 stars
Title: Handy device for checking power output etc.
Review: I got this usb power tester to see how much charge I was getting from my 20W solar panel into my powerbanks. I have a 5V buck converter connected to the output of the panel, followed by this device, then the usb cable for the powerbank. It gives me all the info I require: Volts, amps, time, and power output. It has a reset button which you hold for a couple of seconds to reset the device.I have also tried it on a couple of my chargers to check their output levels and works perfectly.I’m very happy with this cheap little device and would recommend it.

Reviewer: Undermanager
Rating: 5.0 out of 5 stars
Title: It works
Review: It works well, so show the power being drawn on various devices, including my solar panel.

Reviewer: Mr D R Newman
Rating: 4.0 out of 5 stars
Title: Great for quick USB measurements
Review: This is great for quickly measuring USB voltage and current draw. However, I regret not thinking about the inputs I would need. I had some Micro USB chargers, which I could not test without an adapter. Also I expect I will end up with USB-C devices I want to test in future. Other USB power testers available would have given me greater flexibility.

Reviewer: Daniel
Rating: 5.0 out of 5 stars
Title: Simple works
Review: Not too much to say. Does the job, display look very clear. Highly recommend.

Reviewer: Jonathan Dodds
Rating: 5.0 out of 5 stars
Title: Great price
Review: Great bit of kit for checking output of solar panels. Worth every penny.

Reviewer: Moura
Rating: 5.0 out of 5 stars
Title: Works well.
Review: The product works well. But I didn’t understood why it is age restrict?

Reviewer: stuart
Rating: 1.0 out of 5 stars
Title: Male usb end crushed
Review: Usb end crushed. Managed to repair end and re soldered 2 pins. Works ok build quality cheap.

Reviewer: Mark
Rating: 4.0 out of 5 stars
Title: 👍🏻
Review: 👍🏻

Reviewer: Giacomo V.
Rating: 5.0 out of 5 stars
Title:
Review: L’ho comprato per tenere sotto controllo la batteria di un pannello fotovoltaico e capire all’incirca la carica residua dopo le ricariche dei vari dispositivi.

Reviewer: Aldo Crespi
Rating: 5.0 out of 5 stars
Title:
Review: Risponde perfettamente alle aspettative

Description:
【RESET BUTTON DESIGN】: USB power tester has designed with reset button, and you can press 3-5 seconds to make the screen cleared, and this USB Voltmeter Ammeter can bring you good using experience.
【REAL-TIME TESTING】: USB power tester can measure USB charging voltage, current and discharge capacity over time, which is 100% brand new and has high quality assurance.
【MEMORY FUNCTION】: USB power tester support empty display with memory function after power off, and the power tester can be used to check the performance of USB cables, wall chargers, car chargers and power banks.
【FAST CHARGER AVALIABLE】: USB power tester is compatible with fast-charger, which can work under up to 20V, and the power tester does not interfere with fast charge negotiation, will be good helper to you.
【AFTER SALE SERVICE】: If you have any questions about this USB power tester, please feel free to contact us immediately,and we will serve you wholeheartedly.