Watertightness and IP rating
HYBRID concept: the choice of standard batteries or CORE rechargeable battery for your headlamp
How does my lamp perform with the CORE rechargeable battery?
How is Petzl lighting performance measured?
Is the CORE rechargeable battery compatible with my Petzl headlamp?
Development and testing
Brightness or burn time, a question of balance
Non-rechargeable energy sources
Rechargeable energy sources
Which energy source for which use?
Information on LED lighting