Great point on extra batteries. I have converted to only flashlights that use AA batteries. I carry EDC (with other stuff) an Inova X1and when further afield, I carry my Leatherman Wave with Streamlight Jr. Luxeon in a case on my belt in addition. Both use AA and then I carry spare AA batteries. Simplicity helps!!! Especially in an emergency I dont want to be groping for different size batteries.