Question about Palm Treo 500 Centro

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I left my power cord at work

Will the usb charge my phone?

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A USB port supplies 5v at 1amp

If you only draw 500ma off there is a chance that the voltage will go up to 6v

Not a killer if it wants 5v but you will cook the phone if it only needs 3.7v

Some phones will only accept 3.7v (Some Nokia units)

Look at the phone battery and it will tell you what it needs

Posted on May 24, 2009

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A USB port puts out 500ma, and will charge your phone perfectly fine and will NOT damage the phone. That is the way I charge all my phones. The statement that if you don't utilize the ports full voltage potential (5v.) that it will raise the voltage is not true. I am an Electrical Engineer and that is simply not possible and 5v. will not hurt your 3.7v. battery, otherwise most 3.7v phones wouldn't come with a USB charger, right? The power supply of the computer regulates the voltage, you can only DROP voltage if you EXCEED 500ma. Hope this helps, and charge away!

Posted on Nov 07, 2009

  • rruss39 Nov 07, 2009

    One more thing I forgot, Most all cell phones batteries are 3.7v. I really cant remember seeing one that wasn't but if you have an old phone you might want to check the battery to see what voltage it is before you make a charger by cutting the end off the bad charger and connecting the wires to that of a charger you no longer need, just in case. A 5v. battery will charge on a lower voltage, say 3.7v, but it will simply take a little longer to charge up. But be careful about the opposite, like charging a 3.7v battery with a charger over 5v. or you most likely will smoke the battery or worse, start a fire when it explodes!

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Palm centro hotsync cable will charge the phone but more slowly than a wall or car charger,

Posted on Jul 02, 2009

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Posted on Jan 02, 2017

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HiSense Sero 7 tablet. Why no charge, no power?


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Laptop does not recognize usb connection to phone


The problem very well could be that it isn't connected fully (maybe not fully plugged in). or that the USB port on your laptop is dysfunctional. The charger could even be malfunctioned. Try to charge in another USB (as not all are powerful enough to do so). If that doesn't work, you could buy a new usb cord to try that, and then if that doesn't work you may just want to stick to using the wall charger.

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1 Answer

Charging is not working


First Option:
mostly nokia chargers doesn't make problems...
just try the following..
connect ur mobile with a system (usb cable)...
found out whether it is charging or not...
if the same prblm appears then there is a prblm in ur cell phone or power jack(socket)...
if it charged with usb cable buy a new charger
Please change Phone Bettery and check the charging
IF Charging Problem not Solved So

Second Option:
Your Phone charging IC Fault So Please change charging IC
And charging Problem will Solved Quickly

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1 Answer

Charging my juke with a usb cord


Fully charge the battery to maximize playing time. However, it is not necessary to fully charge or completely discharge the battery each time. You can charge the battery by connecting the jukebox either to the AC power adapter (fastest) or to a USB port on the computer. The battery icon in the upper right corner of the screen indicates the remaining battery charge.
  1. Connect the USB combo cable to the AC power adapter, and then plug the power adapter into an AC power outlet. Or, you can connect the USB combo cable to a USB port on the computer.
  2. Plug the combo cable into the jukebox. Make sure that the top of the plug (the side with the arrows) is facing the same direction as the front of the jukebox.
    View Picture
  3. If you are charging your jukebox from the computer's USB cable, turn your jukebox off. If your jukebox is on, it cannot charge from the computer's USB cable. Note: If you are charging your jukebox from the AC power adapter, you can leave your jukebox on as it charges, but it will take longer to charge.

  4. If the jukebox is on, the power cord icon appears in the upper right corner of the display. The keypad's backlight turns on while the battery charges, and then turns off when the battery is fully charged.
  5. When your jukebox battery is finished charging, pinch the two side buttons on the plug, and then pull the plug out of the jukebox.

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1 Answer

Am unable to charge my mobile 6234 with pc through usb cable.


Check with another PC to confirm the USB port. If there is no charging then there is fault in the cord or the phone harware.
Check with another cord,check the phone if the cord was tested with another phone to be working good.

Aug 16, 2011 | Computers & Internet

1 Answer

Im using a usb cord to try an charge my phone, but its not working


You could try and get another USB charging cord because yours might be broken. You could try and clean your charging port because sometimes dust gets in the way of the USB and port.

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1 Answer

I have a Rubicon V424 Media Player. I looking for power cord for it, how to find and what kind power cord I need?


You need a USB cord that goes into the port to the left of where the micro SD card plugs in. Go to this link and they will send another cord, or you may have one that came with a camera. Make sure the unit is turned on when charging. Select(dark background) the USB charge in the menu that comes up when you plug in the cord.
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2 Answers

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I had the same problem - you need to install the latest Blackberry USB driver software on the PC/laptop you are trying to charge it with. They should be on the CD you got with the Blackberry (you don't need to install all the software if you don't want to - just the USB drivers). This enables the USB ports to allow enough power to charge the device when it's connected.

If you don't have the CD, do a quick Google for "Blackberry USB driver" and download the most up-to-date ones you can find.

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