Our custom designed battery charger can recharge markers, target lights and glow chargers in around 2 hours. ??Just plug it into a wall outlet and begin charging. The red light will show that there is required charging. When the unit is completely charged the light will turn from red to green. We recommend getting one charger for every 8-10 markers and lights. You then just put them on a simple 6-12 outlet zip strip for easy charging of multiple lights.??