I got these off Brian T. last month, and they are in perfect working order and condition. Reason I'm selling is that the batteries don't last long enough for 12 or 24 hour racing, which i plan on doing more in the future. But they are great for commuting or night-rides of up to 3 hours. There are two nightsticks batteries that fit in a mount which you bolt under the bottle cage, a 5w and a 10w bulb, a fast charger (charging time 4 hour), remote switch and helmet mount.
From each battery you get 2.8 hour light with the 5w, and 1.4 hour with the 10w. 5w is enough for commuting, 10w is needed for off-roading at night.
I've had another set myself for three years now, commuting all winter and often night-riding, and they work great.
This is what they look like: http://www.wiggle.co.uk/v2_product_deta ... 4000000597
I paid £50 for the set (check the retail price on the website, and that's with only one battery), please make me an offer if interested.
Cheers,
Sylvain