Don't charge through a USB port because the port may not be putting
out enough juice fast enough to properly charge the battery even
though the iPod's battery indicator says it is fully charged. Your
computer can only charge if it is on and not in the sleep mode, so for
best result connect directly to a wall adapter/charge. Here is a
support articles from Apple about this:
http://docs.info.apple.com/article.html?artnum=60941
For best results, try not to use computer ports to charge your iPod.
USB is especially sensitive to how many devices are on it and what the
resulting bus voltage is. It may even display the charging icon but
not be adding much to the battery. USB versions prior to 2.0 will not
charge your iPod (and probably be too slow for its other functions).
Even USB 2.0 is limited to 700 milliamps and the iPod "like" to see
one full amp for charging, plus some to spin the HD in the iPod while
mounted. Some (early) iPod models will not charge from USB, period.
Some PCs use 4-pin Firewire cables (all Macs are 6-pin) which carry no
charging voltage, so they won't work at all for recharging and can
allow your iPod to run down and cause serious problems while updating
firmware, restoring, or loading songs. Both USB and Firewire require
the iPod to be mounted by your computer as an external drive, which
means the iPod's HD is spinning, using some of the juice that the
battery might like to have. And if the computer sleeps or is turned
off, the battery won't charge either device and in some cases will
actually drain through the port circuits. Bottom line: if your ports
are not doing a good job of charging your battery, use the wall
adapter to charge for several cycles before questioning the battery's
credentials. If you have a new iPod which only comes with USB, don't
panic; it can work fine. But if you do experience problems, either
take everything else off the USB bus (except mouse & keyboard) and/or
get an AC adapter. Also note that earlier Firewire chargers can be
safely used to charge new USB-only iPods. You'll need a special cable,
however (about $10).
Another possibility to consider is the battery meter is inaccurate,
depending upon the model you have. Your iPod battery is probably
fine, fully charged, and ready to play for many hours. The battery
meter is really only useful for one thing -- it is an approximate
reminder of when to recharge (its just guessing). As an example, 1st
generation iPod has run for more than two hours with the meter showing
empty. And a 3rd gen ipod always shows very low charge on the meter
right after charging, but after using it for a while (sometimes as
long as 20 minutes) it fills in the black bar and reads more like
what's really in the battery. 5th Gen models have more of an accurate
meter.
Here is a support articles from Apple about this:
http://docs.info.apple.com/article.html?artnum=61475
There is also a problem about draining by itself over night. This
happens to some iPods because they actually turn on by itself, and if
it's on shuffle or repeat, will play until the battery dies. To test
for this, simply turn up the volume all the way, plug in external
speakers, and shut it off. You'll find out pretty fast if it turns on
by itself…
To read more about resetting your meter, about charge cycles, etc,
read this resource Website at http://www.vsa.cape.com/~danh/ipod.htm
--- In AppleiPod@yahoogroups.com, "henrymouni" <henrymouni@...> wrote:
>
> Warm greetings for a new iPod man.
> Is it ok to connect the my iPod dock to the keyboard USB for
charging up my iPod?
>
>
> Henry.
>
------------------------------------
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*** The iPod/iTunes FAQ: http://www.mcelhearn.com/ipodfaq.html ***
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