I found a Cateye 100 something or other lying at the roadside near Banchory a few months back. One of those recharge via a USB jobs - very bright. Handy for dog walking but in a dodgy situation I will never trust any thing but my old Petzl with proper bulbs and batteries - utterly bombproof. New tech has yet to win my confidence in almost any circumstance.
Don't get me started on t'interweb either - superfast broadband my @rse..........