Charging an IPod with USB

I'm in China where their electrical supply is 220V. I am using my laptop to
charge my stepson's IPod. However, he is sometimes at his father's house
where he only has access to a desktop which is using the 220V electrical
supply. Does the desktop USB connection supply the same amount of power as
my laptop USB connection or will I toast his IPod when using the USB
connection on the desktop? In other words, do all USB connections supply the
same amount of output power, regardless of the input voltage?

Please excuse my ignorance and thank you in advance for any assistance.

C.B.
--
It is the responsibility and duty of everyone to help the underprivileged
and less fortunate among us.

"C.B." <> wrote in message
news:028C0CB6-0BFB-4186-AEAD-...
> I'm in China where their electrical supply is 220V. I am using my laptop
> to charge my stepson's IPod. However, he is sometimes at his father's
> house where he only has access to a desktop which is using the 220V
> electrical supply. Does the desktop USB connection supply the same amount
> of power as my laptop USB connection or will I toast his IPod when using
> the USB connection on the desktop? In other words, do all USB connections
> supply the same amount of output power, regardless of the input voltage?
>
> Please excuse my ignorance and thank you in advance for any assistance.
>
> C.B.
> --
> It is the responsibility and duty of everyone to help the underprivileged
> and less fortunate among us.


All USB connections supply the same output voltage (5 volts DC) unless there
is a failure in the system, then of course then anything plugged into them
would be fried if the voltage was unregulated.

Remember that the computer's power supply on a desktop converts AC current
to DC current and delivers reduced voltages to the components inside the
desktop: 12 volts for some components, 5 volts for other components and 3.3
volts for the CPU, memory and other components which may also be reduced
further by specific "stepdown transformers" for the components.

On Tue, 16 Mar 2010 09:27:15 +0800, C.B. wrote:

> I'm in China where their electrical supply is 220V. I am using my laptop to
> charge my stepson's IPod. However, he is sometimes at his father's house
> where he only has access to a desktop which is using the 220V electrical
> supply. Does the desktop USB connection supply the same amount of power as
> my laptop USB connection or will I toast his IPod when using the USB
> connection on the desktop? In other words, do all USB connections supply the
> same amount of output power, regardless of the input voltage?
>
> Please excuse my ignorance and thank you in advance for any assistance.
>
> C.B.

USB outputs 5 volts regardless of what is powering the source. This
includes computers and wall warts.

--
Gene E. Bloch letters0x40blochg0x2Ecom

Thank you for your prompt reply. I appreciate it very much.

C.B.

"LVTravel" <> wrote in message
news:...
>
>
> "C.B." <> wrote in message
> news:028C0CB6-0BFB-4186-AEAD-...
>> I'm in China where their electrical supply is 220V. I am using my laptop
>> to charge my stepson's IPod. However, he is sometimes at his father's
>> house where he only has access to a desktop which is using the 220V
>> electrical supply. Does the desktop USB connection supply the same amount
>> of power as my laptop USB connection or will I toast his IPod when using
>> the USB connection on the desktop? In other words, do all USB connections
>> supply the same amount of output power, regardless of the input voltage?
>>
>> Please excuse my ignorance and thank you in advance for any assistance.
>>
>> C.B.
>> --
>> It is the responsibility and duty of everyone to help the underprivileged
>> and less fortunate among us.
>
>
> All USB connections supply the same output voltage (5 volts DC) unless
> there is a failure in the system, then of course then anything plugged
> into them would be fried if the voltage was unregulated.
>
> Remember that the computer's power supply on a desktop converts AC current
> to DC current and delivers reduced voltages to the components inside the
> desktop: 12 volts for some components, 5 volts for other components and
> 3.3 volts for the CPU, memory and other components which may also be
> reduced further by specific "stepdown transformers" for the components.

I appreciate your prompt reply. Thank you for your assistance.

"Gene E. Bloch" <not-> wrote in message
news:1ehexokbor6gj$....
> On Tue, 16 Mar 2010 09:27:15 +0800, C.B. wrote:
>
>> I'm in China where their electrical supply is 220V. I am using my laptop
>> to
>> charge my stepson's IPod. However, he is sometimes at his father's house
>> where he only has access to a desktop which is using the 220V electrical
>> supply. Does the desktop USB connection supply the same amount of power
>> as
>> my laptop USB connection or will I toast his IPod when using the USB
>> connection on the desktop? In other words, do all USB connections supply
>> the
>> same amount of output power, regardless of the input voltage?
>>
>> Please excuse my ignorance and thank you in advance for any assistance.
>>
>> C.B.
>
> USB outputs 5 volts regardless of what is powering the source. This
> includes computers and wall warts.
>
> --
> Gene E. Bloch letters0x40blochg0x2Ecom