Intelligent fast charger reaches 100% charge level in just 30 minutes (1.5Ah battery). Other charging times 2Ah (40min), 3Ah (60min) and 4Ah (80min). Provides 2 x faster charging times than original GMC 18V charger. Multiple safety features protect the battery and charger. Compatible with GMC18V15 (1.5Ah), GMC18V20 (2Ah), GMC18V30 (3Ah) and GMC18V40 (4Ah) batteries. LED status indication and long-life charging contacts. Please note that GMC 18V power tools with 3Ah or 4Ah batteries already include this high-current charger.