Fenix E12 with Battery (130 lumens)
An excellent light weight, small but robust and long lasting backup light. Easy to cave by if the main light fails. When also backed up by a Fenix 5 (which takes 1 AAA battery) in the emergency kit you cannot really run out of light but will not be burdened down.
Date Added: 02/15/2015 by Graham Proudlove