Question about cell phones and chargers

[[email protected]]

Are there any electrical engineers or techs that can give some concrete
guidance on the following?

I recently bought two Sanyo MM-8300 phones through Sprint PCS to
replace an older Sanyo SCP-4900 and Sanyo SCP-8100. One of the selling
points for the new phones was that they would accept the same chargers
and accessories of my older phones (New Chargers fit old phones, old
charger fit new phones). I have also seen posts from other users that
the 8300 uses the same chargers and accessories as a number of other
Sanyo phones, and a number of retailers sell the generic chargers that
will fit most recent Sanyo phones.

I know that the older chargers I have will plug in to the phone and I
am sure that they will charge them. However, I noticed that the travel
charger included with my new 8300s look basically the same as my 8100
and 4900 travel chargers (they all are the flat Sanyo plug, not the
barrel plug), but the specs are slightly different.

The charges have different model numbers:
4900/8100 - Model SCP-07ADT
8300 - Model SCP-12ADT

The input stats are the same :
AC 120V 60 Hz 7W

The output stats are slightly different:
4900/8100 - DC 5.4V 800 mA
8300 - DC 5.2V 800mA

This slight difference brings up a few questions:
What effects, if any, might be likely from using an older charger with
slightly higher voltage output?
Will the slight difference in voltage negatively affect the phones?
Will this only affect charging times?


I don't have any specifications for the car chargers that I currently
have for my older phones and can't find any specifics regarding the
output. Are the car charger specs likely to be different, as well?

Do you think it is safe to continue using the same car chargers I used
for my 4900/8100?

Thanks in advance,
JW

 

[JANA]

These phones all have an internal voltage regulator and inverter. If you are
out by a few decimal points it should be safe. What would be very critical
in your case, is the polarity. If the polarity is wrong, the phones will be
damaged!

As far as the current rating for the power supplies are concerned, these
match okay.

--

JANA
_____


Are there any electrical engineers or techs that can give some concrete
guidance on the following?

I recently bought two Sanyo MM-8300 phones through Sprint PCS to
replace an older Sanyo SCP-4900 and Sanyo SCP-8100. One of the selling
points for the new phones was that they would accept the same chargers
and accessories of my older phones (New Chargers fit old phones, old
charger fit new phones). I have also seen posts from other users that
the 8300 uses the same chargers and accessories as a number of other
Sanyo phones, and a number of retailers sell the generic chargers that
will fit most recent Sanyo phones.

I know that the older chargers I have will plug in to the phone and I
am sure that they will charge them. However, I noticed that the travel
charger included with my new 8300s look basically the same as my 8100
and 4900 travel chargers (they all are the flat Sanyo plug, not the
barrel plug), but the specs are slightly different.

The charges have different model numbers:
4900/8100 - Model SCP-07ADT
8300 - Model SCP-12ADT

The input stats are the same :
AC 120V 60 Hz 7W

The output stats are slightly different:
4900/8100 - DC 5.4V 800 mA
8300 - DC 5.2V 800mA

This slight difference brings up a few questions:
What effects, if any, might be likely from using an older charger with
slightly higher voltage output?
Will the slight difference in voltage negatively affect the phones?
Will this only affect charging times?


I don't have any specifications for the car chargers that I currently
have for my older phones and can't find any specifics regarding the
output. Are the car charger specs likely to be different, as well?

Do you think it is safe to continue using the same car chargers I used
for my 4900/8100?

Thanks in advance,
JW

 

[[email protected]]

Thanks for the reply JANA. That is what I hoped. The polarity is the
same on these chargers. I appreciate the help.

JW