Most useful accessory I carry for my laptop when travelling is a bottle of scotch (preferably single malt). That way I can get quietly pissed while simultaneously getting pissed off trying to log on through hotel switchboards. I now limit logon attempt time to about thirty minutes to avoid hangovers in the morning.
This is an accessory you can get most anywhere (even duty free on some routes)and installation is absolutely painless.
BTW BA - didn't you run this thread a couple of month's ago?
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Feline
(I Sit, I Watch, I Smile)