Features 

• Charges 18V 3.0 Ah Li-Ion battery BL1830 in just 22 minutes! Rapid charge
• Charges 18V 4.0 Ah Li-Ion battery BL1840B in just 36 minutes!
• Charges 18V 5.0 Ah Li-Ion battery BL1850B in just 45 minutes! 
• 3 Active Controls System (Current, Voltage & Temperature) provides an optimal charge and ensures battery cannot be overcharged or overheated during the charging process
• Central Processing Unit (CPU) in battery communicates with charger to analyze battery and charge according to its unique condition
• Forced Air Cooling Fan keeps battery at optimum charging temperature and prevents over heating
• Digital Power Display indicates condition of battery and current charge level (-80%, +80%, 100%)
• Use with Adapter ADP04 - Part No. #193949-2 - to charge pod/stick style batteries