... brightness can be adjustable LED HeadlightBrand: AUSAModel:AS-6688Power supply:lead-acid rechargeable battery (4V,600mAH)Light source : 1W high- ... power LED(1)two tranches of strong and weak light, touch-button switches.(2) intelligent charge management, over ... it can be used for camping,travelling,finishing,hiking,mining and so onAlso,it's rechargeable, when power accidently off, ...