The exposure smart charger works with exposurersquos rechargeable lights for fast and effective charging itrsquos smart technology allows the light to be rapidly charged for the first 90 just in case you are in a hurry and then the final 10 is trickled to allow for maximum power and charge time this is definitely a must have accessory for your rechargeable exposure light and it also features a led that varies between red and green depending on its state of charge so you are always kept