Petzl - NAO+ BELT KIT Extension Cable for NAO+ Headlamp YOUR BATTERY WHERE YOU NEED IT: Allows the rechargeable battery for the NAO + headlamp to be moved, thanks to a 106.5 cm extension cord. ATTACHABLE: Included is a clip for attaching the rechargeable battery to a belt, a backpack. KEEP THE WEIGHT OFF YOUR HEAD: Weight on the head is reduced to 130 g. INCREASE YOUR BATTERY LIFE: Increases battery life by keeping the rechargeable battery in a pocket, protected from cold. PERFECT FOR ALL YOUR ACTIVITIES: Ideal for trail running, cross-country skiing, mountaineering or anything else you might enjoy.