The flashlight typically cures Solarez resin in 30 seconds or less. It also has heat-abating “Pulse Power” function. This reduces resin shrinkage and yellowing and increases the resin bond. It comes complete with one rechargeable 18650 Lithium Ion battery and digital battery charger which will be good for hours of high-intensity light and hundreds of re-charges. The charger has a polarity indicator warning and READY signal.