Rechargeable industrial flashlights replenish their battery charge for reuse, eliminating the need to regularly replace and dispose of batteries. They produce more consistent light output throughout their run time than flashlights powered by disposable batteries. These aluminum body flashlights dissipate heat from their LEDs, allowing extended use without burnout. They are commonly used for navigating underground tunnels, search-and-rescue operations, and other applications requiring lights to stay on for long periods of time. Aluminum won't melt like plastic, but it conducts electricity, is heavier, and is more likely to get scratched or dented.