This dimmable head lamp of Petzl (serie Strix) is not rechargeable (Alkaline) is a good choice, equipped with a powerfull lamp and cheap on batteries. When dimmed the burning time is 180 hours (20Lm and 20m) 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.