Electricity parameters: Ballast input voltage :9 ~ 16v Working voltage :12.6v Working current :2a Starting max current: 8a Power output : 20w Output temporary max voltage: 23kv Battery mode :icr18650x3s2p(2200mah) Battery charge voltage :12.6v f+ 0.1v Battery lifespan : (charge and discharge times) fª500 times.