DROK USB Tester, USB-A USB-C 2.0 Multimeter Dual USB Ports PD QC 3.0 with Color LED Display Battery Charger Monitor, 7 Modes Capacity Voltage Current Power for Laptop Power Bank Solar Panel

This review is for DROK USB Tester, USB-A USB-C 2.0 Multimeter Dual USB Ports PD QC 3.0 with Color LED Display This is a voltage/current/watts dual display. It was both USB-A and USB-C input, but only one can be used at a time. The particular model I received is marked YB26VA . The label on the product lists the input voltage as 3.2-30V DC at up to 5A. Note that the supplied paper documentation is for the older models only rated to 15VDC. I measured voltage and current using a calibrated 6.5 digit multi-meter. The Drok's indicated values were within 1%, more than accurate enough for any likely use case. The USB-C input does not give any display until a USB-C device is plugged into Output1. This is because it has to see the USB-PD negotiation that will set the voltage being supplied from the power source. I suspect this is confusing, as I read several reviews where they said the USB-C did not work. It is important to have a USB-PD compliant cable to make the best use of this device. If you use the USB-A input, the output is the same as the input, 5VDC nominal. If you want to force the output to 5V from the USB-C output, you press button 2, which is described in the user guide. In general, I use the USB-C input for Output1 and the USB-A for Output2, which is a USB-A connector. This DROK USB device works very similar to prior USB-A only versions, so the user interface should be familiar. I needed a replacement for another brand's USB-C current measurement tool (cross style) where the USB-C connector broke off the PCB. The DROK is much more sturdy and other DROK testers have lasted many years. I ike DROK products and this one fits my needs very well. It is used for easily figuring out when devices are (mostly) charged, so they can be used without waiting for the last 5% of charge, which takes a long time. It is also very useful for measuring how much charge (Watt Hours) a device will store. This is helpful in determining how much life a battery has remaining. Recommended!

Drok USB Tester with USB-A and USB-C plugs fits into the female receptacle of charging blocks. Notably those meant to charge smartphones and tablets. The Drok USB Tester has female (indented) receptacles into which are inserted the cable leading to the smartphone or tablet. When hooked up this way (110 Volt wall socket or power strip to Drok USB Tester to the smartphone or tablet) it shows the Direct Current (V-DC) voltage and Watts (W) pulled. Web search will show what the device should pull for Volts and Watts. On my iphone and ipad, results matched the published data.

Works as described - can display current and voltage passing through a USB port. But it doesn't appear to be able to pass data at the same time, so its utility is more limited than I would have preferred.

About this as a need and a requirement and the automotive industry as a technician at a dealership to test many different outputs on vehicles now for peripheral hookups to phones and iPads etc this thing actually really does work it does help you narrow down the root cause of a customer's concern it is really nice hot displays to you power output and he can really tell where the issue lies either on the output side or the cables of the customers for the device of the customers etc the price is reasonable the quality is good the function is what you should expect and it just works

Extremely useful to see if your gizmo is actually charging, or if the cable is bad (or the charger). See how many amps your device needs. Flexible USB-A and USB-C cables reduce the risk of damage.

Excellent meter. So far it out performs my Klein low voltage meter. The flow through monitoring of the circuit from my solar panel to the load is very helpful.

Works OK. Verifies if wall warts actually are charging and how well the voltage regulation works. Pocketable and relatively cheap compared to data logging "high-end" tools. Build quality good for the price, but not indestructable and better than a lot I have seen for twice the price (~$20).

The "DROK USB Tester, USB-A USB-C 2.0 Multimeter Dual USB Ports PD QC 3.0 with Color LED Display" works well enough for a short period of time; eventually the USB-C cable dies, and only the USB-A input remains usable. DROK's customer service consists of an e-mail address ([email protected]), apparently managed via WordPress, that bounces with a "smtp; 552 5.2.2 Quota exceed the hard limit" rejection message, and a customer support web page that allows you to compose a message. When I tried the latter, I received a message advising me: "In your order details, please select the Get Help, it will go to Seller Messaging page, as shown in attached screenshot. Our team will reply to you within 24 hours." I was unable to replicate the steps--there is no "Seller Messaging page" if you aren't a seller--and Amazon tech support wasn't able to help either. Finally, there is no warranty. Expect the unit to fail shortly after Amazon's return period ends. If you're lucky enough to have a unit that works, you may want to understand the LED codes that appear as the devices negotiate upon connection. As far as I know, DROK does not document these codes.

Excelente producto y de buena calidad, gracias