Customers love the 1000 lumen Genesis but wanted to see a less expensive, less wasteful way to keep it shining. This slim yet powerful primary light is now fueled by a single 18650 rechargeable battery with built-in charger. The recessed switch surround lights up with a built-in power indicator, avoiding power level surprises. The Genesis is designed primarily for underwater use, and as such we recommend against extended use topside, particularly in high ambient temperatures.