Exposure Lights builds many of their headlights with what they call Smart Port Technology Plus. This is what allows their modular design. And with the Smart Port, you can bolster the run time of your compatible headlight with this 1-Cell Piggyback Battery. It plugs into the back of the light and charges the light as you use it.
The 1-Cell Piggyback Battery is sealed inside a machined plastic housing and is weatherproof just like Exposure's lights. It includes a snap-around mount and Velcro strap to attach it to your light or your helmet. The 1-Cell Piggyback Battery will increase your run-times from 10-100% depending on which Exposure light you have.
Exposure Lights have a two year warranty against defects in materials and workmanship.