The Metabo SC 30 Battery Charger is designed for charging all LiPOWER and LiHD slide-on battery packs (12 V - 18 V). It features an "AIR COOLED" function, a patented system that cools the battery pack during charging to maintain optimum temperature. This technology helps to increase battery pack lifespan and can reduce total charging time by up to 30%. The charger also includes a compensation charge feature, where the battery pack is charged for 1 second every 45 seconds with 2.5 ampere to conserve capacity. It offers a 3-year warranty on all Metabo battery packs and chargers, regardless of the number of charging cycles. The approximate charge time for a 1.5 Ah battery is 30 minutes.