The Pelican 3759 Replacement Ni-Cad Battery Pack is designed for the Pelican 3750 Big Ed Rechargeable Flashlight, and delivers up to 2.25 hours of use on a single charge. This industrial grade battery pack can be used hundreds of times before it needs to be replaced, and helps the Pelican Big Ed Rechargeable Flashlight produce 65,000 candlepower of brilliant light. The state-of-the-art fast charger or trickle charger (sold separately) quickly charge your battery while the LED light indicates the charge state of the battery and eliminates overcharging and over heating.