With the Rozemeijer Pike Float with Light, you always have light in the darkness! And it is precisely in those dark moments that those cautious pike and zander are a little less cautious when feeding. This float comes with a CR425 (non-rechargeable) battery. Unscrew the cap, remove the battery, and insert the pin into the cap. The light will turn on, and you can screw the cap back on. The float is completely waterproof, allowing you to present a bait fish even during the darkest moments. Battery included.