USB "charger doctor" (volt+current display)

I hear ya! Can't wait to get mine :)

Well these things can vary but I got mine from Ebay seller estore2009.

Thanks for the photos, videos and comments!

I will tell you guys which version is the one that DX sells…. in 2 weeks :_(

What do you guys use this for?

I will use it to check the voltage drop of the usb 5v when charging/using high powered devices and measuring the current they draw when charging/using…. also checking the quality of the ps

Mine arrived just right now. Sadly I have just loaded all devices to 100%…

But it seems to work, soldering is okay, the shunt is soldered in a bit angled but I see there no problem.

Neat little device.

Werner, what do you wanted to say with “Sadly I have just loaded all devices to 100%…”??

I think he is saying he cannot test any chargers just now.

Among other things, I plan to use it to test / check the output on some small solar panels.

I'm interested to see just how big an efficiency drop I get with changing alignment and levels of light.

I think, all his batteries are charged up to 4,2V and he hasn't any other at the moment. Now he has to use a flashlight to get a battery, which must be charged again. The sun will be down here in Germany in maybe an hour :)

It’s handy to measure current draw from USB power sources without having to make something from spare parts and DMM.

[quote=Chloe]
Well these things can vary but I got mine from Ebay seller estore2009.
[/quote=Chloe]

I ordered one from there too - arrived this morning, which is pretty quick considering non-tracked China(?) Post. Neat little tool - thanks for the link Chloe.

Been waiting 33 days for mine, contacted the seller yesterday, he said wait a bit longer :frowning: , I’ll be claiming when it gets to 40 days.

Things seem to be getting to me quicker by China Post lately. How is yours? Does it look like the same revision or more like HKJ’s example?

I haven’t taken it out of the plastic casing, but it looks similar to your picture. It says “CHARGER Doctor” and “3.5V- 7.0V, 0A-3A” on front. Reads 5.06v from my laptop. Only took 11 days to get here - pretty good.

[quote=Woody]

I just ordered. How long did it takes your tester to arrive from this seller?

Mine was ordered 29th August; sent next day, arrived in UK 10th September.

Thanks Woody. Two weeks sounds good to me. Hopefully I'm as lucky.

UPDATE: An hour and ten minutes have passed and it's now marked as shipped.

Mine arrived a couple of days ago.

Unfortunately I didn't realise the display only shows 2 decimal places. Not a problem for most users I imagine, but not quite what I need to check the output from my small solar panels in less than full sun!

Does anyone know of one of these that resolves down to 1mA?

Mind you it has been very interesting comparing actual output of various plug packs and battery boxes against their labelled ratings. Seems there is a whole system of "Chinese mA" I wasn't aware of previously!

You could use this and check more easily with your multimeter. I'd put type A connectors on both ends though.

https://www.tindie.com/products/FriedCircuits/usb-tester/