Half Circle Solar Powered Road Studs For Pedestrian Crossing In South Africa. Solar road stud-NOKIN Traffic Co.,Ltd. Ultra-thin Solar road stud NK-RS-Q7. Power Supply: High Efficient Solar Panel (5.5V/80mA) Battery: Lithium Iron Phosphate Battery (3.2V/500mAh) Size:114*90*11 mm. Get Price Details.