Archived from groups: comp.sys.laptops (
More info?)
Every mobile device should work just fine in any country.
It is called a universal supply. It determines line voltage
and adjusts automatically. It should work in voltages as low
as 90 VAC and as high as 265 VAC. However you are responsible
for all failures. Every device has a label that says voltage
limits. You must read that label. No one can do that reading
for you.
All minimally acceptable laptops only require a plug
change. Plugs for every country can be identified at:
http
/www.interpower.com/ic/guide.htm
http
/kropla.com/electric2.htm
Technical facts:
http
/www.interpower.com/ic/p65info.asp
Additional information on phones:
http
/kropla.com/phones2.htm
http
/kropla.com/phones.htm
Those promoting a UPS for surge protection typically don't
even know what the UPS does. UPS can even output as much as
270 volt spikes (as this one does) and 200 volt square waves.
This is called a 120 volt modified square wave. Not
destrutive to computers because computers already contain
effective protection. But this UPS output is why
manufacturers quitely recommend no surge protectors on UPS
output (or voltage converter).
A relay inside that UPS takes milliseconds to respond. A
destrutive surge completes in microseconds. Where is
protection in that heavy UPS? Mythical. Yes it claims a
surge protector circuit. Then forgets to mention no protetion
provided from the type of surge that would damage a laptop.
They did not lie. They just promoted a half-truth so that
myth purveyors would recommend that UPS for protection. Myth
purveyors assume protection from one type of surge is
protection from all types of surges.
Effective protection is already inside the laptop. Those
silly $0.10 parts inside the plug-in protectors do not provide
anything additional (other than enrich the manufacturer). If
those $0.10 components were so effective, then they would
alrady be inside the computer.
Effective protection must be provided by the building and
make a less than 3 meter connection to earth ground. Surge
protector must connect short to something different - surge
protection.
Yes, a laptop is connected to surges whether powered on or
off. Laptop already has effective internal protecton.
Protection that can be overwhelmed by one unique type of
surge. Will that silly little protector stop what miles of
sky could not? Of course not. Again, the myth purveyors
would have you think so because they are promoting a myth:
surge protector = surge protection. To promote their
ineffetive products, the surge protector manufacturer must
avoid all mention of surge protection - earth ground.
Get adapting power plugs for your countries. Don't waste
money and weight on silly UPS or surge protector
recommendations. Unplug your laptop when done OR have it only
connected to one external connection. For example, the
destructive surge can enter on AC electric and leave on phone
line. Disconnect the phone line. Now the electricity called
a surge has no incoming and outgoing path; therefore no surge
damage.
To be damaged, the laptop must complete a path from cloud to
earth ground. Remove that path - one method of protection.
If laptop connects only to AC electric and not to phone line,
then where is the necessary incoming and outgoing path? In
the meantime, anything a UPS is going to accomplish is already
in the UPS inside a laptop.
"news.verizon.net" wrote:
> Hi all
> I am an American and intend to travel/work for an extended period
> of time in SE Asia
>
> How do I confirm if my laptop power supply will work on the power
> ratings of other countries ?
>
> I will not be travelling with a UPS so I am worried about
> electrical damage to the laptop. Can a laptop be damaged by a power
> surge when it is turned off but the battery is charging ?
>
> TIA
> Dave