Go Back   Wireless and Wifi Forums > Cellular Communications > US Networks > alt.cellular.verizon
Register FAQ Forum Rules Members List Calendar Search Today's Posts Advertise Mark Forums Read

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 10-24-2006, 12:51 PM
Z Man
Guest
 
Posts: n/a
Default Razr "Unauthorized Charger"

I bought a car cord/charger at a computer show. It fits perfectly, but I get
a message on the phone that reads "unauthorized charger". I have done some
research and found that this occurs frequently with after-market chargers,
and sometimes even with OEM charges. Usually, folks raise this question when
they plug their phone into the USB port on their computer. I am only
concerned with car use and charging. Regardless of the message, will the
phone still drawer power from the car? Will it still charge?



Reply With Quote
  #2 (permalink)  
Old 10-26-2006, 05:15 AM
SteveC
Guest
 
Posts: n/a
Default Re: Razr "Unauthorized Charger"

Yes
"Z Man" <z1z@hotmail.com> wrote in message
news:K6n%g.2857$Wz2.964@trndny09...
>I bought a car cord/charger at a computer show. It fits perfectly, but I
>get a message on the phone that reads "unauthorized charger". I have done
>some research and found that this occurs frequently with after-market
>chargers, and sometimes even with OEM charges. Usually, folks raise this
>question when they plug their phone into the USB port on their computer. I
>am only concerned with car use and charging. Regardless of the message,
>will the phone still drawer power from the car? Will it still charge?
>




Reply With Quote
  #3 (permalink)  
Old 10-26-2006, 09:46 PM
Dennis Ferguson
Guest
 
Posts: n/a
Default Re: Razr "Unauthorized Charger"

On 2006-10-24, Z Man <z1z@hotmail.com> wrote:
> I bought a car cord/charger at a computer show. It fits perfectly, but I get
> a message on the phone that reads "unauthorized charger". I have done some
> research and found that this occurs frequently with after-market chargers,
> and sometimes even with OEM charges. Usually, folks raise this question when
> they plug their phone into the USB port on their computer. I am only
> concerned with car use and charging. Regardless of the message, will the
> phone still drawer power from the car? Will it still charge?


Here's the problem. The USB specification limits the minimum power
available from the interface voltage pins to 500 mA at 5 volts, or 2.5W.
The GSM version of the RAZR, which first adopted the USB charger cable,
can apparently live with that, but the CDMA phone is more power hungry and
needs more than 2.5W to charge. The chargers supplied by Motorola will
deliver significantly more than 500 mA, and as a practical matter a lot
of other USB chargers and interfaces will too, but with the latter you
can't count on them to support more than the standard requires. While
the phone still uses a standard USB jack for the charger, the power
requirement is non-standard.

The "unauthorized charger" message is hence telling you that the power
output of your charger is significantly lower than a Motorola charger
would provide. It may or may not still charge the phone, you'll have
to try it to see. If it does charge the phone it will take longer to
do so than a higher power charger would. If you were sold this charger
explicitly for use with that phone you got shafted, but otherwise it
is just an unfortunate incompatibility caused by the non-standard
power draw those phones need from their USB interface.

Dennis Ferguson

Reply With Quote
  #4 (permalink)  
Old 10-27-2006, 12:21 AM
Mike S.
Guest
 
Posts: n/a
Default Re: Razr "Unauthorized Charger"


In article <slrnek27l8.91.dcferguson@dennispc.local>,
Dennis Ferguson <dcferguson@pacbell.net> wrote:
>On 2006-10-24, Z Man <z1z@hotmail.com> wrote:
>> I bought a car cord/charger at a computer show. It fits perfectly, but I get
>> a message on the phone that reads "unauthorized charger". I have done some
>> research and found that this occurs frequently with after-market chargers,
>> and sometimes even with OEM charges. Usually, folks raise this question when
>> they plug their phone into the USB port on their computer. I am only
>> concerned with car use and charging. Regardless of the message, will the
>> phone still drawer power from the car? Will it still charge?

>
>Here's the problem. The USB specification limits the minimum power
>available from the interface voltage pins to 500 mA at 5 volts, or 2.5W.
>The GSM version of the RAZR, which first adopted the USB charger cable,
>can apparently live with that, but the CDMA phone is more power hungry and
>needs more than 2.5W to charge. The chargers supplied by Motorola will
>deliver significantly more than 500 mA, and as a practical matter a lot
>of other USB chargers and interfaces will too, but with the latter you
>can't count on them to support more than the standard requires. While
>the phone still uses a standard USB jack for the charger, the power
>requirement is non-standard.
>
>The "unauthorized charger" message is hence telling you that the power
>output of your charger is significantly lower than a Motorola charger
>would provide. It may or may not still charge the phone, you'll have
>to try it to see. If it does charge the phone it will take longer to
>do so than a higher power charger would. If you were sold this charger
>explicitly for use with that phone you got shafted, but otherwise it
>is just an unfortunate incompatibility caused by the non-standard
>power draw those phones need from their USB interface.


I'm not sure that's all there is. My wife has a V3c, and I tried a
Zip-Linq USB power supply rated 5V @ 1000 mA and got the same error
message.



Reply With Quote
  #5 (permalink)  
Old 11-20-2007, 03:17 PM
Junior Member
 
Join Date: Nov 2007
Location: South NJ
Posts: 0
Default Weird stuff

This may solve the riddle for whoever is still reading these posts. For the past year and a half I have been charging my RAZR V3m from Verizon with a mini-USB cable, any cable, my digital camera, the USB floppy, etc, I never really checked whether all of them were 4pin or 5pin, so I don't have any further information about that.

So today I come in to work and plug in my cell to the mini usb cable that I have been using for at least 2 months (in this particular PC) and I get the "unauthorized charger" message, I think.. "***?" this has been working all along. So I do a little reading in here and a couple of other forums and it dawns on me that I changed me USB port on that I was connecting to recently. I plug in the USB cable to the other port that I was using and voila! the PC recognizes it and loads the drivers, etc etc and now it's charging.

For whatever reason, the 6 USB ports in the back of this PC are split in 2 and 4, on the group of 2 I have a laser printer and on the group of 4 I have a wireless keyboard. Maybe the printer was pulling too much juice for the USB to be able to give it to the phone, and obviously, the wireless keyboard doesn't pull in too much power.

So there it is, if you have a mini-USB cable that is able to provide power to other devices (USB floppy, etc), it should be able to charge your RAZR provided the USB port gives enough power (voltage, amps, whatever it is, i am not an EE). Try different USB ports from your computer, the ones at the back, the front ports and start with a direct connection to the PC instead of using a hub (although an externally powered hub may work too).

I imagine that's where the 5pin USB comes in vs the 4pin, the 4pin sounds like it's 1pair receive and 1pair transmit, so only data comes through, but the 5th wire may provide the electrical.

If you want to get a cheap mini USB cable, try getting a Dell mini USB cable on ebay, they come in 3ft and 5ft, I got a bunch of 3ft at less that $1 each plus shipping and I have one on each laptop bag, one in my car and 2 in the office.

My 2cents, I hope this helps anyone.

Vince
Reply With Quote
  #6 (permalink)  
Old 03-29-2013, 07:20 PM
Junior Member
 
Join Date: Mar 2013
Posts: 0
Default Unauthorized Charger

Based on my experience, there does seem to be something more to the "Unauthorized Charger" problem than just available power. I bought a RAZR 2 V9m Verizon CDMA phone online and was unable to charge the phone with the supplied wall charger. After downloading and installing the appropriate drivers from Motorola, I am able to charge the phone using a USB Type-A to micro-b cable attached to a USB port on my computer rated at 1100mA. I am also able to charge the phone while plugged in to any port on an 8-port powered USB hub attached to the same computer. I am also able to charge the phone with a wall charger (from a growing assortment of such things kept in an electronics "junk" drawer) that is rated at just 500mA. I was unable to charge the phone (using the Type-A to micro-b cable) with wall chargers of 1A and 2.1A. I can't offer any technical explanation as to why my experience is not predicted by current posts, but there it is.
Reply With Quote
Reply


« Verizon/Straight Talk iPhone 5 on Page Plus and T-Mobile. | Still no T-Mobile Coverage in Yosemite, Page Plus Works but Roams »
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to transfer pictures, video, & ringtones for Motorola RAZR V3 Robin Colleen Moore alt.cellular.cingular 5 01-11-2008 06:09 PM
Cingular RAZR V3 connect to MPT via bluetooth pkg_cnb alt.cellular.cingular 7 02-14-2007 02:47 AM
VX8300 or RAZR V3 Walter Cohen alt.cellular.verizon 6 10-23-2006 01:31 AM
Razr Art Horsell alt.cellular.cingular 0 09-16-2006 03:51 PM


All times are GMT. The time now is 07:46 AM.



Powered by vBulletin® Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0 PL2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45