It works .... without battery! The flashlight turns on with a repeated pressure of the hand which causes it to accumulate enough energy to function. You will never have to recharge it with the cable or with batteries!Up to 30 minutes of non-stop brightness - our flashlight is perfect for camping, hiking, walking in low light, repairs and more. It self-recharges: Just press the handle to charge it. No cables, chargers or batteries are required.This flashlight is equipped with 3 bright white LED bulbs that illuminate up to a distance of 5 meters. The dynamo flashlight is really useful during power outages, car breakdowns, outdoor activities ... or for children who want to go on an adventure!