With built-in long lifespan,rechargeable,free-maintance 3500Mah high capacity sealed lead acid battery. ... ,free-maintance 3500Mah high capacity sealed lead acid battery.b.Super long lifespan battery,circularly charge and discharge upto 250 times.c.Use ... be scratched, and it is brighter.e.Use super bright, focusable,environmental protect, long life 10W LED, with lower power consumption, longer ...