How long will a wireless receiver keep powering the LED before the rechargeable battery is exhausted?
That depends on many factors, such as the output setting, type of LED, the size of the battery, and the percentage of time the LED is powered on (duty cycle). For a 50% duty cycle, a blue LED on a 1g receiver will last over an hour, while a yellow LED on a 2g receiver will last over 6 hrs.