... 000hoursBattery, high Efficiency, Maintenance-free Lead-Acid Battery or Gel battery, A, Our battery casing is designed specially for ... the battery is buried underground.B, Life span ≥5year , Gel battery: ≥8 yearsController, intelligent digital controller-A. Self ... waterproof connectorsB, Life span: ≥10yearsProduction field Solar street lamp project case Solar street light Wiring diagram DC12V system ...