The Bosch GAL 18V-20 charger is compatible with all Bosch 18V Li-ion batteries. It has a compact design for easy storage and transport. Replaces the Bosch AL1820CV AL1820 CV Features and Benefits: Compact charger design - gets users power ready fast, with dual-mode charging, compatibility with all Bosch 18V Li-ion batteries Error indicator - will alert the user if charging is interrupted due to temperature and/or battery failures Flexible charging solution - Compatible with all Bosch 18V Lithium-ion batteries Compact design - small and light charger designed to be convenient and portable Charging Current Max: 2.0 A Output Voltage: 18v Charging Times: Standard 18v 2.0Ah (80%/100%): 50 / 65 min Standard 18v 3.0Ah (80%/100%): 70 / 95 min Standard 18v 4.0Ah (80%/100%): 96 / 125 min Standard 18v 5.0Ah (80%/100%): 120 / 155 min Standard 18v 6.0Ah (80%/100%): 145 / 185 min Charger Size (LxWxH): 135 x 111 x 60 mm Weight: 400 g.