Its a specific drive but obviously will work for other low power devices. Nice going WD, may buy one later.
I've noticed that a lot of caddies actually draw over 1A for a split second when powering up, which is very bad for the USB port long term on older laptops.
No kidding. I have a Rikiki (LaCie, never again)(it's a 2.5" usb powered external HDD) that systematically shuts down my old and trusty eeepc (1000he) when plugged in if the laptop is running on battery.
