When you do this you will notice that the beam can be focused. The headlamp fits very well with most climbing helmets on the market and if it does not fit, more than likely you can purchase clips called crochlamps. As for accessories you can purchase recharge kits or any spare part from an authorized Petzl dealer. Word for the wise. Always remember to disconnect the battery terminals before you pack away your headlamp.
All headlamps are notorious for turning on inside a pack.
You do not want to end up with a bunch of dead batteries.