Because I thought I could
Join Date: Dec 2004
Location: Wash DC Metro
Bikes: November, Trek OCLV, Bianchi Castro Valley commuter
The AA battery pack is the weak spot of the design. Nothing much Dinotte can do about that if you want the convenience of AA batteries. You can use elastic bands, stretchy electrical tape, a piece of inner tube, or heat shrink tubing to keep the batteries in place and the 9V-style connector attached. Elastic bands are probably the easiest and cheapest. The big plus is AA batteries are ubiquitous, and you can replace a damaged battery holder (or carry a spare pack ready to go) at Radio Shack. I use rechargable NiMH cells in mine and carry a set of AA Lithiums as a back-up.
I did pick up a 600L headlamp and Li-ion taillight last fall during one of Dinotte's sales for my commuter. My AA 200L is now a helmet light and I use the AA-powered taillight on my road bike.