for tracking lights I have used and been super happy with my Streamlight Litebox rechargeable light's
http://streamlight.com/en-us/product/product.html?pid=17
not super cheap, about $ 150.00, but for how well they work and last, they pay for themselves!
have a few,. one is at least 15+ yrs old and still works as good as day one
has a 9+ hr run time off a charge, comes with a home and car charger
has an adjustable head ,. so when you find your critter you can use it to light things up hands free
its NOT small, but I only use for tracking when I want GOOD light, and has that LONG run time on a charge
I keep one in my home and cabin as well, plugged in all the time, for when power goes out, they too are at least 10+ yrs old and I check every so often and they work as good as new
I also have one of there smaller Stinger rechargeable I keep in my truck 24/7, its at least 12+ yrs old and works great too, has a home and car charger as well
I see they now have them in LED"s mine are NOT as LED's were not an option back then, I have to think there run time would maybe even longer!
they get my vote on a tracking light!