It took me a long time to find this special charging cable, so maybe others with a ZTE or Huawei phone might find this information useful. The problem is that these phones are very picky about the chargers you can use with them. I’ve been building battery packs and about 3/4 of them do not charge my ZTE Engage smartphone … until now.
With this cable, I can now charge my phone from any USB battery pack or charger that gives 5V to the USB port!
This was a very annoying issue for me, and nobody seems to know jack squat about what exactly these phones expect from the USB cable that most chargers don’t have. Obviously it has something to do with power to the data pins, but at least know I have a good clue, and a cable that lets me use the chargers I want, like my Waka Waka.
And my chinese watch says "waterproof 100 meters". I doubt it. ;)
Android devices get their charge through the classic positive and negative USB contacts. I'm sure the data pins inside this cable are shorted, otherwise your phone would charge in USB mode, rather than in AC mode.
I should’ve bought two and spliced one to test continuity on the data pins.
Experimentation on about a half dozen battery packs and chargers show that having 5V to the USB is not enough for my ZTE engage or my son-in-law’s Huawei phones. My own experimentation shows that most other devices like my wife’s HTC One, bluetooth headphones, tablets, Kindle, etc., all work fine with just 5V to the + and - USB pins.
Now, the charging cable I linked above suddenly makes my phone charge with the devices it wouldn’t charge with before:
I had asked HKJ about it in one thread, and he gave me a link to a table showing that some makes/models short the pins, some give power to the pins, and some demand a computer to talk to. There doesn’t seem to be a single universal standard.
EDIT: Maybe HKJ can chime in? Maybe I’m a clueless idiot, but I find it valuable to have a cable that lets me charge my phone with chargers and packs that didn’t work with all my other micro USB data cables.
I just checked and there is no Settings->Power. Probably because it’s a stock version of Android ICS. Well, with now two people telling me to short the pins, I’ll be more daring about risking damage to my phone
I’m not sure I understand. The cable I bought lowers the charging current to .5A? If all my cable does is short the pins, and the chargers which work with a data cable short the pins, how is shorting the pins any different in one instance and not the other? Pardon my ignorance, I’m a software engineer and not a electronics engineer.
I’m with you there. The special cable is going into my road warrior bag and day to day I think I’ll just use the Ruinovo, which charges my phone with a stock data cable and seems like a solid little charger. I also just got the one linked below today from FT, which does charge my phone as well. But it’s nice to know that I could use my Waka Waka in an emergency with that cable.
Maybe I’ll write one, if I can the damn Android USB driver to work right with my Virtualbox Windows 8 development environment. I have a “theoutdoornerd” branded flashlight app I wrote but can’t seem to test. I love my ZTE phone, but man, it sure has been annoying every step of the way. But I do appreciate your thoughts, and I’ll look on Google play and see what’s out there.