Question about Logitech MX700 mouse recharging off PC

I have a question about the Logitech mx700 cordless rechargeable mouse
and its lack of an external adapter power supply. I was given a combo
Logitech cordless keyboard & mx700 mouse for Xmas (as part of the
price/gift, it was already attached to my win xp pc by the home tech
people whom my relative bought the system off of.) I noticed right away
that the mouse when placed back in the cradle will continue to charge,
even after the pc is turned off- a feature I like very much. I also
noticed that there is no adapter option/outlet on this cradle, so I
guess it's solely powering off the USB or pc battery when the pc is
off?

I would like to purchase the same mouse (but only the mouse & not the
keyboard) for another relative's win 98 pc, that has one circular mouse
port with a USB adapter on it and which currently houses a cordless,
but battery eating/non rechargeable Logitech mouse. When I looked on
eBay, I saw no such mx700 mouse, either with or without a keyboard,
that DIDN'T come with an adapter. So they must not charge off the pc
alone like mine does.

Did I get some kind of rare version of this mouse as a gift? Also, if I
was able to locate this particular mx700 with no adapter, would it be
compatible with my relative's older win 98 USB adapter'd/round mouse
port, as in, would it still be able to draw power from this source when
the pc is turned off?

Thanks for any input offered

"bosk" wrote in message
oups.com...

I have a question about the Logitech mx700 cordless rechargeable mouse
and its lack of an external adapter power supply. I was given a combo
Logitech cordless keyboard & mx700 mouse for Xmas (as part of the
price/gift, it was already attached to my win xp pc by the home tech
people whom my relative bought the system off of.) I noticed right away
that the mouse when placed back in the cradle will continue to charge,
even after the pc is turned off- a feature I like very much. I also
noticed that there is no adapter option/outlet on this cradle, so I
guess it's solely powering off the USB or pc battery when the pc is
off?

The MX700 has a "wall wart" for power. It is connected via
a "Y" at the USB connector end of the cable which attaches
to the charging cradle. So, there is just the single cable coming
out of the charger.