A multi-voltage quick charger for all Bosch Blue Professional Lithium-Ion batteries from 14.4 to 18 volts.Features and Benefits:An impressive approximate charge time of between 30-50 minutes depending on battery sizeQuick charge mode means 4.0Ah batteries are ready to use with 80% of its capacity after 25 minutesConvenient cord wrap and Active Air Cooling means the batteries have a longer lifetime