On Tue, 09 Sep 2003 20:21:44 GMT, "Marc Reinig"
wrote:

Since the hub itself is a USB device, and the hub will not be enumerated by
the powered off laptop, the downstream ports should remain unpowered.

Marc Reinig
System Solutions

"Jim Turner" wrote in message
ws.com...
On Tue, 9 Sep 2003 17:24:05 +0200, "andrea rossi"
wrote:

Is there something to use to give energy to USB devices?

For example if I want to use my USB calculator when my notebook is off,
there's a device (for example with battery) to give energy?

Thanks


Get a self powered USB hub

Depends on the hub and the device. Devices, such as keyboards and network
adapters are powered so they can wake up the system even when it is
"off". .