The Gerber Infinity Ultra Flashlight makes great company for the Pocket Survival Pak. It’s near-indestructible, lightweight, and runs more or less forever.
The Ultra’s patented Diode Step-up Regulator technology provides superior luminosity, a 30 foot beam, and up to 100 hours burn time from one common AA battery (included).
With LED technology, there’s no bulb to change. The compact anodized aluminum construction with epoxy coated circuit enables extra durability and two o-rings provides a water proof seal for up to 10 feet underwater. This flashlight is only 3.25″ long (fits in your pocket) and weighs 2.0 oz (you won’t notice it’s there).
In fact, add an Energizer E2 lithium AA battery and it will be even lighter, keep running longer and will store and operate at extreme temperatures.