It's a Cygolite Dualcross, FYI. I'll be bringing it inside between my commutes (office and home). Supposedly it has a 4 hr. run time on hi! Since I only use my light on the 1-1.5 hr ride home I'm hoping I can get away with charging it once a week. Reason being that there are several legs of my commute I won't need the hi on, if any.

Thanks for the info, guys.

BTW, while we're on topic, what would the advantages of the Li-Ion battery be other than size?