It's debatable if these things are a good idea, since they basically trick your phone or tablet into thinking it's plugged into a dedicated charger instead of your computer. That can result in your device trying to draw a lot more current than the computer's USB port is designed to supply. A bit like wrapping tin foil round a fuse! There is the possibility that you could damage your computers 5V USB bus by overloading it.
You can also make your own simple USB protocol defeater by getting a standard USB lead, cutting the data lines and shorting them together at the end with the charging device to make it think it's plugged into a charger. But again, it's not recommended.
If you have a large screen phone and are having issues with battery life then a better option is to carry a proper charger or power bank.
An easy way to reduce your devices power consumption for longer run time is usually to turn screen brightness down. That will also extend the operational life of the screen's backlight.
I don't actually recommend that you use a device like this. The bottom line is that it can potentially damage your computer/laptop by overloading its USB ports.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and dodgy USB devices at https://www.patreon.com/bigclive

13 thoughts on “Inside a ucharger hi-speed charging adaptor, and making your own.”
  1. Avataaar/Circle Created with python_avatars Terry Hayward says:

    You need to design a cct that will put the magic smoke back in to these chips, you will make a fortune ๐Ÿ˜‚

  2. Avataaar/Circle Created with python_avatars DoctorX17 says:

    Probably cheaper to get a proper charger than to use that gadgetโ€ฆ especially if you damage your motherboard!

    Didnโ€™t realize you could just short the data lines โ€” I remember when I made my own charger battery bank for my iPod Touch 4th gen I had to use +/- 1.8v on the data lines to get it to charge at all

  3. Avataaar/Circle Created with python_avatars SimCapener says:

    Some people buy these to not have data transfer on their phone or PC because they picked up a sketchy charger from the parking lot.

  4. Avataaar/Circle Created with python_avatars Multi Coder Gaming says:

    I a while ago had a bit of an incident. I had a USB DVD drive and accidentally plugged a 12v barrel jack into the drive and it pushed 12v down the USB into the computer. Let's just say USB rfid reader was fried but no other damage thanks to motherboard protection

  5. Avataaar/Circle Created with python_avatars Frank Hutchings says:

    Thanks, Clive. Now I know how to connect a smoke bomb to a nuclear generator!

  6. Avataaar/Circle Created with python_avatars Vihree Linja says:

    Ppl are too dumb these days

  7. Avataaar/Circle Created with python_avatars TERRABYTEONE TB1 says:

    I got a usb micro charge cable that came out many years ago, kick-started (first cameout when kick starter was new) that does the same thing, data switch o usb that plugs in, says data sharing, or double power charge, led changes colour red, green….

    I tested it but never used it.., but now I'm worried it may damage usb port, will it damage a usb 3.0 port?

  8. Avataaar/Circle Created with python_avatars John Dล‚ugosz says:

    Multiple standards: Yes, I got a battery bank that has several USB outlets; one is for Apple and one is for the later standardized version.
    I got a gizmo from "zyx" or something like that, that is based on a microcontroller and has a OLED screen that shows stats and graphs. It will emulate the proprietary charger that the device is meant for. I don't know how it knows, but it shows on the readout: Apple, Samsung, whatever, with various letters and numbers indicating the variation.
    As for charging from a PC: there are dedicated USB A ports that are meant for charging, recognizable by their strange color. They can provide power even when the PC is off, and can provide more power then the normal 500mA. Using that gizmo with the special socket or a powered hub that provides more power but doesn't tell the device that it can draw more power, might be OK.
    The cycle repeats, with USB C connectors and power distribution standards. Plugging the wrong things together can actually damage the devices! Apparently the power can give higher voltages and some providers are too dumb to actually do the negotiation and some devices can't refuse what they can't actually handle. There's a warning on my external display / dock about 12V.

  9. Avataaar/Circle Created with python_avatars Phil Church says:

    what phone is a qh1?

  10. Avataaar/Circle Created with python_avatars john rose says:

    What is the phone you mentioned with such a good battery life? Cheers.

  11. Avataaar/Circle Created with python_avatars Respawn Restricted says:

    Not unbox therapy it's unbox cancer cuz that is with that douchebag host is

  12. Avataaar/Circle Created with python_avatars Wolf Paranormal Adventures says:

    Hi Clive iv always wondered how an USB killer works??

  13. Avataaar/Circle Created with python_avatars Charlie Nolan says:

    My computer case has a cheap safeguard for too much current draw- it uses a SATA power cable to supply more 5V current when there is too much current draw

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