I've just recieved my DX bike lights (the $77 jobs), after only two weeks, very happy with them for the price etc. But how does everyone else attach the battery to thier bike? Is it simply a case of taping it to the stem or top tube? As I can't see an easier way & the case it's in is only any good to fastening to a belt?!

use velcro tape

Also remember to wrap in in cling film or stick it in a placky bag to keep the water off the battery circuitry!

I got a meter of sticky velcro from wilco for a quid. I then stuck the burr bit to the hook bit, and bobs your uncle – a nice velcro strap (or in fact two 50cm bits which are more useful).