1. Can be packed into 4x18650 batteries and combined them to bicycle lights powered; 2. Standard 5.5DC Interface(Case diameter 0.95cm, 0.5cm diameter within the interface); 3. Can put 4x18650 batteries in to power bicycle lights
1.Please put in the battery in a right way. 2.Charge it when power indicator light flashes. 3.Don’t use the device in the water. 4.Waterproof:IPx4.