Review request for HKJ [USB Power Devices]

Even if the review queue is quite full, I wonder if you can review some Quick charge 2.0 usb charger.
I wonder what kind of signal is used to trigger the 9V and 12V from the charger.

Here is a cheap one
http://www.aliexpress.com/item/For-xiaomi-mi4-Fast-Mobile-USB-Travelling-Charger-With-Qualcomm-Quick-Charge-2-0-US-Wall/32309739200.html

Here is a more serious one
http://www.aliexpress.com/item/Qualcomm-Certified-Aukey-Quick-Charge-2-0-54W-5-Ports-USB-Desktop-Charging-Station-Wall/32375717507.html
also available on amazon.fr, better chance to get a genuine one
http://www.amazon.fr/s/ref=sr_pg_3?rh=n%3A340858031%2Cp_4%3AAukey&page=3&sort=price-asc-rank&ie=UTF8&qid=1438158020
Sorry it’s in french but on it don’t appear on amazon.co.uk.

The quick charge is probably using usb power delivery standard, but as long as I cannot use it there is not much point in reviewing adapters with it.

If anybody see some circuit boards than can be used to trigger it, please post a link to where I can get it.

You could give this lenovo USB charger a go. Would be interesting to see how safe they are.

You can find it here

I have ordered it, but it might be some time before I have a review ready.

No worries mate. Thanks for sharing your work!

http://www.tomopowerbank.com/product/tomo-power-bank-v8-4/

http://www.tomopowerbank.com/blog/tear-down-tomo-v8-4-to-check-if-its-the-best-portable-power-bank-of-yours/

claims "10-protection" and "93% efficiency".

too many claims!!!

I’m confused whether they actually include batteries - it does say “Battery not including”, but also says “Built in18650 batteries can be replaced …”, so I suspect they aren’t included, which makes it a little expensive, compared to, say, the Xiaomi powerbank.

I also love the “Panasonic or Trustfire? It’s your choice”. :wink:

Hi HKJ,

Did you already test a DROK usb meter?
Such as:
https://www.pretzellogix.net/2015/04/20/the-portable-led-usb-multimeter-that-you-didnt-know-you-needed/
http://www.amazon.com/gp/product/B00S2HJAUE/
http://www.amazon.com/gp/product/B00S2IA3DG/
http://www.droking.com/drok-new-version-micro-oled-usb-3-0-meter-voltage-current-charger-detector-a-must-have-tool-for-a-geek/ (USB 3.0 13V version)
https://www.youtube.com/watch?v=o0Ud9sJNX84

It seems to be very interesting on paper, that’s why your expertise would be very appreciated :slight_smile:

I have not tested the DROK brand, but something similar:

http://lygte-info.dk/review/USBmeter%20Volt%20Current%20Capacity%20UK.html

http://lygte-info.dk/review/USBmeter%20voltage%20tester%20OLED%20UK.html

Hmm, if they are similar they are not very accurate then :_(

They are fairly accurate, what do you expect better?

I may have misunderstood your tests, but I thought they were less accurate than this other one that you tested too:

It is about the same.

Look at the "Display U" column with current=0 and the "Display A" column when I test with different currents.

Voltage will not be very precise when current is flowing, it will be something between voltage at the input and the output.

The one with the lowest resistance will usual be the winner (That is a very important parameter on these meters).

4xAA emergency powerbank wiv flashright:

http://www.ebay.com/itm/121274503719 (cheapest, in all colors)

http://www.amazon.com/dp/B00I0RA3XE (same one, in black)

http://www.amazon.com/dp/B00HCBHZV2 (seems to be from the same factory)

HKJ please test this Power Bank

+1

That one looks like the most advanced i have seen yet.
I hope it is a good one, 8x Sanyo 3500GA should be about as good match as anything out there i think to this powerbank.

Hi HKJ. Just saw this on GB and would like to have your review if possible :slight_smile: Even if the answer is a negative, I want to thank you once again for all the great work you do.

http://www.gearbest.com/cables-adapter/pp_77158.html

and this one too.
http://www.gearbest.com/car-gadgets/pp_203508.html

I waiting for this that I backed the ultimate charger!!! https://www.kickstarter.com/projects/ezelleron/kraftwerk-highly-innovative-portable-power-plant

I usual do not do car adapters, but I have ordered this one and also the other one.

Interesting, if this ever get made it could be interesting to test it.