Tiny, functional and lightweight – the TerraLUX LightStar80 flashlight is that. 5 hours run time on 2 AAA batteries, it produces a focused 80 Lumens of brightness. The light comes packaged with batteries, just add and use. It features a rubber end that can be used to bite on, with an easy tap button on the end to tun on/off. It is also water resistant as well.
As a backup flashlight in the pack (to go with your headlamp) or kept in your vehicle, it works great. Just enough to do what you need, without a lot of weight from batteries.
The light can also be found on Amazon below retail: Terralux TLF-802AAA-BK Grey LED Pen Light.