KR8 passthru's don't have a battery, the 510 ones do. It's unlikely it would damage a computer, the passthru would just die, but it can happen.
Just get one of these it's like 4 bux shipped : USB Dual Power Adapter
Can anyone tell from the spec's on this how much power(?) this things is capable of putting out?
Not sure if that's what I'm trying to say.
I use a passthru for a Kr8 from vapor 4 life. Was told when inquiring about a usb port for the car to make sure it has an output of 500mah or whatever.
Is the usb thing from that site in the link capable enough?