Industry-leading innovation from SKIL charges faster and more efficiently than ever. Auto PWR JUMP charges the battery from zero to 30% in just 15 minutes, and fully charges within 60 minutes (based on 2.5Ah battery). LED Status lights show charge status of the battery, so you know how much time is available.The charger manages each cell in the battery to control temperature and maximize battery life. Charging Time: 60 mins for 2.5Ah Battery; 120 mins for 5.0Ah battery. Fueled by the performance and innovation of the SKIL PWR Core 40 System, the Auto PWR JUMP 40 Volt Charger will ensure your tools are ready to go.