I do definitely not have time at the moment with 20+ usb chargers in queue.
https://www.fasttech.com/products/0/10002784/2162000-enb-4-18650-li-ion-battery-usb-emergency-charger
I purchased this power bank and am curious to how it performs, especially since the smaller ENB banks have received such good reviews. I used it on a hike of the Apalachian Trail along with my Armytek Wizard pro and my Galaxy Note 3.
An all too vague request ā if there is any power supply made yet that minimizes vampire drain, Iād sure like to see such things reviewed.
Hereās the news I found a few years ago about a reference design, using a supercapacitor:
http://cache.freescale.com/files/microcontrollers/doc/ref_manual/DRM130.pdf
A second request ā a little essay on when to trash/recycle a power supply.
Specifically ā when a wall wart switching power supply is audible, with a buzz/rapid clicking, Iād guess thatās a capacitor breaking down and itās becoming junk?
What other reasons are there?
(When I give up on electronics, generally I cut off the wire and plug, crack the case, landfull the plastic parts, and recycle the electronic parts.)
I do include information about that in most of my reviews. Most usb power supplies is around 0.25 watt when unloaded, but a few are better.
The noise is not directly a signal about it being old, a new one can also be audible, but the noise pattern will probably change.
The typically old age breakdown is the capacitors loosing capacity, it can be measured, but is a difficult to detect without measuring equipment. The adapter will get hotter and it will probably increase the noise in AM radios.
http://m.gearbest.com/chargers/pp_197038.html?currency=AUD&gclid=CLHLwuqIwcYCFYiVvQodjZYE5A
Might be a good one to test.
RAVPower 3200mAh Power Bank (3rd Gen) Model:RP-PB08 EAN:6950639095127 ebay.co.uk amazon.com amazon.de
Widely available, inexpensive, 1 Amp output, single brand name 18650 (LGABB41865), smart USB DCP controller (switches USB coding to match device), 100 lumen flashlight (also available in non-flashlight version).
Looks like the same internals might even be available under different names.
Anker 3200mAh Astro mini 2nd gen ,
Thanks for all your work, HKJ.
Hi HKJ,
I ordererd two of these āOriginal Kingzone USB wall chargerā at Banggood.
Allready received them and have them in use but I have my doubts about them.
No brand marks on them or whatsoever and they get pretty warm in my opinion.
If you want to test one of these I am willing to pay for one and get it shipped your way.
My problem just now is a long queue of usb chargers, even if I got it today it would probably be more than 3 months before I publish the review.
I try to publish reviews as fast as possible, but with both battery and charger reviews I cannot do more than one usb charger each week.
I would be interested in reviews of single 18650 battery boxes. Because of there size, I find them very suitable for EDCing. I'm willing to send you some widely available ones if your interested in testing them.
I am very interested in them and I might be able to test/review some in a month or two.
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 itās in french but on it donāt 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/
claims "10-protection" and "93% efficiency".
too many claims!!!
Iām confused whether they actually include batteries - it does say āBattery not includingā, but also says āBuilt in18650 batteries can be replaced ā¦ā, so I suspect they arenāt included, which makes it a little expensive, compared to, say, the Xiaomi powerbank.
I also love the āPanasonic or Trustfire? Itās your choiceā.
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, thatās why your expertise would be very appreciated
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