Voltage variations damage?

Have just received by post a 'Fone Storm' car charger for a Huawei Ascend
g300 phone. I wanted to check the specs to see if I had been sent the right
one for this phone.

On the box it says input DC 12v-24v. Output DC 4.2v - 10v. 500ma, max
750ma.

I always understood that tiny components could be damaged by even fairly
minor variations in voltage, so am surprised that the output can be stated
as 4.2v - 10v. It was very cheap only £2. Would I be safer to spend more
and get the official Huawei charger?

On Oct 23, 5:41*am, "jim stone" <tgh6h5t6tu5...@mail.invalid> wrote:
> Have just received by post a 'Fone Storm' car charger for a Huawei Ascend
> g300 phone. I wanted to check the specs to see if I had been sent the right
> one for this phone.
>
> On the box it says input DC 12v-24v. *Output DC 4.2v - 10v. *500ma, *max
> 750ma.
>
> I always understood that tiny components could be damaged by even fairly
> minor variations in voltage, so am surprised that the output can be stated
> as 4.2v - 10v. *It was very cheap only £2. *Would I be safer to spend more
> and get the official Huawei charger?

Hi Jim, I don't know about the particular phone. But it's certainly
possible that the phone can handle a range of DC input voltages for
charging. Is there some specification for this in the phone manual?
That might give you some peace of mind.

George H.

On 2012-10-23, jim stone <tgh6h5t6tu5nzh@mail.invalid> wrote:
> Have just received by post a 'Fone Storm' car charger for a Huawei Ascend
> g300 phone. I wanted to check the specs to see if I had been sent the right
> one for this phone.
>
> On the box it says input DC 12v-24v. Output DC 4.2v - 10v. 500ma, max
> 750ma.
>
> I always understood that tiny components could be damaged by even fairly
> minor variations in voltage, so am surprised that the output can be stated
> as 4.2v - 10v. It was very cheap only £2. Would I be safer to spend more
> and get the official Huawei charger?

some of these devices have a voltage that is configured by the customer,
eg: by selecting the right tip for the cable, (or by selecting the
right cable) or turning a selector screw...

I would want to see a similar voltage figure to that which is given
for the mains powered charger.

--
⚂⚃ 100% natural

"jim stone" <tgh6h5t6tu5nzh@mail.invalid> wrote in message
news:k65oo2$5sa$1@dont-email.me...
> Have just received by post a 'Fone Storm' car charger for a
> Huawei Ascend g300 phone. I wanted to check the specs to see if
> I had been sent the right one for this phone.
>
> On the box it says input DC 12v-24v. Output DC 4.2v - 10v.
> 500ma, max 750ma.
>
> I always understood that tiny components could be damaged by
> even fairly minor variations in voltage, so am surprised that
> the output can be stated as 4.2v - 10v. It was very cheap only
> £2. Would I be safer to spend more and get the official Huawei
> charger?
>
>


The Ascend uses a micro USB so it should be nominally 5V -
possibly as high as 5.2V - but 10V would almost certainly do
damage.

Get yourself a USB to micro USB cable and a car charger that has
a USB outlet (or two.) Certain to work. You can also get a USB
mains plug as well to charge at home.



--
Woody

harrogate three at ntlworld dot com

In uk.telecom.mobile Woody <harrogate3@ntlworld.spam.com> wrote:
> Get yourself a USB to micro USB cable and a car charger that has
> a USB outlet (or two.) Certain to work.

Usually...

http://hackaday.com/2012/08/15/buyin...-saving-money/

Theo

In sci.electronics.basics George Herold <gherold@teachspin.com> wrote:
> On Oct 23, 5:41?am, "jim stone" <tgh6h5t6tu5...@mail.invalid> wrote:
>> Have just received by post a 'Fone Storm' car charger for a Huawei Ascend
>> g300 phone. I wanted to check the specs to see if I had been sent the right
>> one for this phone.
>>
>> On the box it says input DC 12v-24v. ?Output DC 4.2v - 10v. ?500ma, ?max
>> 750ma.
>>
>> I always understood that tiny components could be damaged by even fairly
>> minor variations in voltage, so am surprised that the output can be stated
>> as 4.2v - 10v. ?It was very cheap only ?2. ?Would I be safer to spend more
>> and get the official Huawei charger?
>
> Hi Jim, I don't know about the particular phone. But it's certainly
> possible that the phone can handle a range of DC input voltages for
> charging. Is there some specification for this in the phone manual?
> That might give you some peace of mind.

I've seend this dubious output rating of 4 to 10 or 4 to 9 volts on
generic garbage micro usb chargers off ebay.

they don't work right with many phones, in case you were curious.