Visting Peru,Does the World Travel Adapter Kit work there/need converter??

The world adapter kit should have an appropriate
plugin adapter to use with your computer's power
adapter. The actual converter unit will auto-select
and - the power output should be the same to the
computer - even if the input to the power adapter
is 220 in Peru or some other place, compared to
the US/Canada, etc standard of 110v input.

Only the shape of the plugin you'd put into the
wall socket is different, to use the regional port.

A 'surge protection unit' may not be worth the
expense, unless you get something also able
to get a good one for both 110 and 220. And
then, a better unit (but heavier) would be a
small UPS backup power supply with filter
built-in. Better than simple surge protection
the good ones will stablize out put power.
Getting one of these for travel may be costly,
in that you'd ideally need one that would work
and also auto select to put out adequate power
for your MacBook power adapter in both 110/220.

I have a UPS for my desktop computer and if I
need to use my portable in the vicinity, I will also
use it with the power adapter for the portable Mac.

A portable power unit for traveling with a 'Book
giving you surge and some backup power may
be available, but I wonder about the local 220v
power and if you could get something adequate
that would work with Peru's local volt/amp power.
A UPS is more intelligent than a surge strip; but
you may be limited to using the latter item.

If you have an iPod power supply (AC adapter) these are also automatically
switching or auto-detecting, so all you'd need is the little end part from the
world travel kit. If the design of the iPod AC Adapter is like the ones I've
seen (standard Apple unit) which looks like the MacBook's, you can take the
same adapter piece and use it in place of the other adapter's AC - in
part. The little end part of the adapter (which you can take off to put on
the long AC - in power cord, instead of the prong/plug on adapter part)
comes off when proper effort is applied to it. It is not an easy to come off
item, but you can carefully slide/push the piece to get it off.

[There are third-party chargers for iPods but they may not be
auto-switching or support both 110/220 volts. You can charge
an iPod from the USB cable, but it would then be using the
computer's power. If the portable is fully charged and you
have access to an AC power source, you could easily charge
an iPod from the computer without discharging the MacBook.]

If you have the long AC power cord that goes with the MacBook's AC adapter,
you can see how the modular plug usually shipped on the power adapter is
on the inside; this may help in understanding how it comes off. The world
power adapter kit (from Apple) has matching parts to utilize this feature.

I use a long power cord all the time on my iBook's power adapter; and
the part is identical in how it comes off, as the iPod's standard (cube)
AC power adapter. If nothing else and you are in a travel store, such as
one would find in a larger airport, ask about those single power plugs
that are used for electronics which auto-detect and switch; these are
not real "power converters" since they only need to physically match
the power utility's shape, not change the power from 110/220 or back.
They are the most basic adapters because do not change the electricity,
your Apple product will truly do the adapting to the regional AC power.

[If the end of the iPod adapter is not like that of your MacBook's
(they are like the PowerBook/iBookG4 most exactly) you may
need to check the World kit from Apple as it would likely have
the correct parts; should they have a subtle difference in fit.]

(With few exceptions. There are some products that require a regional
power supply; those are listed in the Apple Support power adapter page.)

•Apple authorized resellers have Apple iPod chargers; so
a visit to them may be necessary to get the correct one
for your iPod. Be sure to look or ask about traveling and
if the unit you find is capable of auto-detecting and running
on 110 and 220 with only a prong adapter kit.

Some Apple products are auto-selecting and others are manual.
If you travel or get a computer from another area, it may be good
to know if you need to switch a switch; or if you don't see one, if
there is something else you need to know.

Maybe this Apple document can help:
"Apple Power Supplies: changing voltage settings"
http://docs.info.apple.com/article.html?artnum=75099