The Olight S10R Baton is also a great choice. About the size of your pinky finger, and insanely bright on high. Takes 1 CR123A rechargeable battery; Cree XM-L2 U2 LED. Modes: high (400 lumens - 0.8 hours), medium (85 lumens - 3.5 hours), low (5 lumens - 56 hours), and moonlight (0.5 lumens - 168 hours). Additionally, there is bult-in strobe functionality. The user interface is great. It's new, so the Amazon reviews are a bit lacking, but checkout YouTube or their older model for more/similar reviews. $50-60 on Amazon (link above).