The Headlamp Battery 4.0Ah is a lightweight rechargeable battery (4.0Ah/3.7V LiPo) that fits the Trail Runner series. This water-resistant battery pack comes in a multi-attachment Velcro soft case that can be attached to the neck plate or belt.
The battery meets IPX5 standard: Water resistant; withstands heavy rain and water from any direction. The LED battery indicator ensures that you can keep track of how much power that remains in the battery. The battery is easily charged via a micro USB cable and has a charging time of 3 hours.
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.