Originally Posted by
steelbikeguy
The Cateye TL-LD630 uses a single AA battery....
TL-LD630-R | CATEYE
I've got them on a few bikes and have been happy with it.
Steve in Peoria
This is the one I bought (auto version) and I got the CatEye 3 for the front as well. I haven't used them yet but that's good news you like them. I was a little worried about the battery life from the specs. I do prefer that I can swap the batteries out myself and use my own rechargeable batteries so I'm always ready and can keep spares in my bag.