solar air bag 1,power of solar panel: 0.5W 2,battery : LI-ION 3.6V 1500mah 3,light source: 1 pc ... many years' experience.Product information: Parametres1, power of solar panel: 0.5W2, battery : LI-ION 3.6V 1500mah3, light source: 1 pc ... , over voltage or over discharge. Which makes us feel free about battery.8, brightness can reach 100-120LM, visibility can reach around10 ...