Silva Free Headlamp Battery M 36 Wh CNY30 while the polarized sky blue

while the polarized sky blue lenses offer full UV400 protection and impact resistance in case of surprises

44 mg calcium

Polarized yellow sunset lenses

Reflective

and look great on most face shapes

Silva Free Headlamp Battery M 36 Wh CNY30 while the polarized sky blueFree Headlamp Battery 36 Wh is a powerful long distance battery. It is rechargeable via USB C and can be attached to a bike frame, helmet or your Free headband. This battery fits all headlamps in the Free Series. Our Free series is made for flexible use regardless of model. You can easily move the lamp unit from the headband and instead attach it to you helmet or a handlebar. The more light (higher lumen) you want the more powerful battery you need to