Important: make sure that you have the Hybrid Battery Case in order to be able to use this battery. It is included with all Trail Runner Free headlamps, if you have an older Trail Runner headlamp you should purchase the case along with the Hybrid battery.
Stay warm for better capacity
The battery capacity could depend on your body heat as well as the outside temperature. The long extension cord from Silva gives you the option to carry the battery close to your body. This could be crucial in many ways. Keeping the battery as warm as possible in cold weather extends its burn time.