The lithium ion batteries in conjunction with our Polar Latch technology will allow the LED’s to be lit for approximately 250 hours. After that, we at IC Outdoors deem the light level below what we would use for the best results, but it will still glow dim for long after. If you think this isn’t that long of a battery life, 250 hours is just over a full month of spearing for 8 hours a day. This will last most spear fisherman multiple seasons.