FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Electronix » design
cell phone charger
Post new topic   Reply to topic Page 1 of 1 [6 Posts] View previous topic :: View next topic
Author Message
kell
electronics forum Guru


Joined: 25 Mar 2005
Posts: 383

PostPosted: Mon Jul 10, 2006 3:07 pm    Post subject: Re: cell phone charger Reply with quote

Michael wrote:
Quote:
Hi everybody.
I just got a Motorola Razr phone. When I tried to charge it off PC
(using generic USB cable) it was complaining about "unauthorized
charger" until I downloaded the driver. When I tried to use generic car
charger ($7 on ebay as opposed to $30 in Verizon store) the phone gave
me same "unauthorized charger" message.
Question: does it mean that the phone is looking for more than +5V on
pin1?
????
Some inkjet printers manufacturers add some intelligence to the
cartridges to make sure that I pay $$$ per "genuine" parts instead of $
for compatible ones. Is this what cell phone makers are doing now?

Sometimes all it takes is to add a resistor in the line.
When I had my old Nokia I tried charging it off a six volt gel cell and
it gave an error message.
I then put a resistor in series with the six volt batt and it worked.
Back to top
rob
electronics forum beginner


Joined: 07 Jun 2006
Posts: 12

PostPosted: Mon Jul 10, 2006 2:14 pm    Post subject: Re: cell phone charger Reply with quote

"Michael" <mkogan1@rcn.com> wrote in message
news:1152535337.056235.204580@m73g2000cwd.googlegroups.com...
Quote:
Please correct me if I am wrong:
if "non-genuine batteries" were the only concern, it would be logical
to include all the "intelligence" with the charger "base" (i.e. the
phone, as the battery is never charged outside of it) and keep the
power source (wall plug, car charger, USB cable) as simple/cheap as
possible.


You're not wrong Michael, I probably am. I can see your point, the stuff I
was referring to is more related to the second point but in regard to the
batteries.
Back to top
mkogan
electronics forum beginner


Joined: 08 Dec 2005
Posts: 14

PostPosted: Mon Jul 10, 2006 12:42 pm    Post subject: Re: cell phone charger Reply with quote

Please correct me if I am wrong:
if "non-genuine batteries" were the only concern, it would be logical
to include all the "intelligence" with the charger "base" (i.e. the
phone, as the battery is never charged outside of it) and keep the
power source (wall plug, car charger, USB cable) as simple/cheap as
possible.


rob wrote:
Quote:
"Michael" <mkogan1@rcn.com> wrote in message
news:1152531644.662613.10410@s13g2000cwa.googlegroups.com...
Hi everybody.
I just got a Motorola Razr phone. When I tried to charge it off PC
(using generic USB cable) it was complaining about "unauthorized
charger" until I downloaded the driver. When I tried to use generic car
charger ($7 on ebay as opposed to $30 in Verizon store) the phone gave
me same "unauthorized charger" message.
Question: does it mean that the phone is looking for more than +5V on
pin1?
????
Some inkjet printers manufacturers add some intelligence to the
cartridges to make sure that I pay $$$ per "genuine" parts instead of $
for compatible ones. Is this what cell phone makers are doing now?


I read something about this a couple of weeks ago in EDN or similar. I can't
believe you are so cynical!!
The real reason they have the battery / charger ID is so you are protected
against substandard non-genuine batteries.
IIRC Maxim were making the parts.
Back to top
rob
electronics forum beginner


Joined: 07 Jun 2006
Posts: 12

PostPosted: Mon Jul 10, 2006 12:16 pm    Post subject: Re: cell phone charger Reply with quote

http://www.edn.com/article/CA6301616.html
Back to top
rob
electronics forum beginner


Joined: 07 Jun 2006
Posts: 12

PostPosted: Mon Jul 10, 2006 12:00 pm    Post subject: Re: cell phone charger Reply with quote

"Michael" <mkogan1@rcn.com> wrote in message
news:1152531644.662613.10410@s13g2000cwa.googlegroups.com...
Quote:
Hi everybody.
I just got a Motorola Razr phone. When I tried to charge it off PC
(using generic USB cable) it was complaining about "unauthorized
charger" until I downloaded the driver. When I tried to use generic car
charger ($7 on ebay as opposed to $30 in Verizon store) the phone gave
me same "unauthorized charger" message.
Question: does it mean that the phone is looking for more than +5V on
pin1?
????
Some inkjet printers manufacturers add some intelligence to the
cartridges to make sure that I pay $$$ per "genuine" parts instead of $
for compatible ones. Is this what cell phone makers are doing now?


I read something about this a couple of weeks ago in EDN or similar. I can't
believe you are so cynical!!
The real reason they have the battery / charger ID is so you are protected
against substandard non-genuine batteries.
IIRC Maxim were making the parts.
Back to top
mkogan
electronics forum beginner


Joined: 08 Dec 2005
Posts: 14

PostPosted: Mon Jul 10, 2006 11:40 am    Post subject: cell phone charger Reply with quote

Hi everybody.
I just got a Motorola Razr phone. When I tried to charge it off PC
(using generic USB cable) it was complaining about "unauthorized
charger" until I downloaded the driver. When I tried to use generic car
charger ($7 on ebay as opposed to $30 in Verizon store) the phone gave
me same "unauthorized charger" message.
Question: does it mean that the phone is looking for more than +5V on
pin1?
????
Some inkjet printers manufacturers add some intelligence to the
cartridges to make sure that I pay $$$ per "genuine" parts instead of $
for compatible ones. Is this what cell phone makers are doing now?
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 1 of 1 [6 Posts] View previous topic :: View next topic
The time now is Sat Jun 24, 2017 3:25 am | All times are GMT
Forum index » Electronix » design
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts 2AA Batteries and one supercap cell foxOnTheRun Basics 0 Tue Jun 08, 2010 1:50 pm
No new posts 12 volts Lead acid battery charger IC Ayesha design 0 Mon Jan 29, 2007 5:20 pm
No new posts car charger for pda DantePT@gmail.com Basics 2 Tue Jul 18, 2006 11:12 am
No new posts light sensitive cell as pixel free ccd and interferometry... mustafa umut sarac design 2 Fri Jul 14, 2006 5:21 pm
No new posts Controlling a relay via cellular phone..... EsDee Basics 49 Wed Jul 12, 2006 9:26 pm

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums |  Medicine forum |  Science forum  |  Send and track newsletters


Powered by phpBB © 2001, 2005 phpBB Group