The Swim Charge Fins are a piece of equipment and an item upgrade for the Fins that can be assembled using the Modification Station. The Swim Charge Fins Blueprint can be acquired from a Data Box. They recharge the Energy of any tool the player holds in their hands as they are swimming. Using the Swim Charge Fins thus reduces the overall need for batteries and power cells. It charges any tool held in the player's hand by 1% for every 10 meters swum. This applies even if you're swimming up using Space or down using C. The energy generation is higher than the Seaglide's energy consumption, thus allowing unlimited use.