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Question about cell phones and chargers

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

Reply to
diamond.h.leather
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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 _____

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

Reply to
JANA

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

JW

JANA wrote:

Reply to
diamond.h.leather

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