Homedics currently have a throw on offer. I think it's around £45 but I've seen it at £80. I bought it on sale at £35.
It's a battery-powered one that holds it in a pocket. This makes it heavy and lop-sided to walk around in but it's great just to sit in if you don't want wires/don't have a socket nearby or if you wanted something for the car (it's brilliant at keeping me warm while Mr. AE drives us around with the 'heating' at sub-zero!).
