This rechargeable battery Li-po from Petzl (Pixa 3R) 930mAh is efficient, is friendly for the environment and is made of high-quality material. Petzl manufactures very qualitative, innovative headlamps. Wearing a headlamp on your head is very practical and common today. 30 years ago (Petlz invention) is was not. Since then, Petzls have become increasingly light, compact, durable and powerful.