Features Ultra M technology: Intelligent battery management for long-lasting battery packs with a 3 year guarantee Patented “AIR COOLED“ charging technology Permanent Electronic Single Cell Protection (ESCP) when charging, for particularly long life Processor-controlled charge and discharge management Capacity display with almost no self-discharge No memory effect Monitored charging with microcontroller Battery diagnosis Charge time approximately 30 minutes at 1.5 Ah "AIR COOLED" function For charging all Li-Power Compact, Li-Power Plus, Li-Power Extreme battery packs For charging all Li-Ion and LiHD slide-on battery packs (12 V - 36 V) with adapted battery pack charging current Charger switches to compensation charge: to conserve the capacity, the battery pack is charged for 1 second every 45 seconds with 2.5 ampere Specification Voltage: 18v Capacity of Battery Pack: 4.0 Ah Air Cooled: Yes Mains Voltage: 230 - 240 V Mains Frequency: 50 - 60 Hz Battery Voltage(s): 12 / 14.4 / 18 / 36 v 12V / 18V 2.0Ah: 30 / 40 mins 12V / 18V 4.0Ah: 60 / 40 mins 18V 5.2Ah: 104 mins 18V 8.0Ah: 160 mins 36V 6.2Ah: 250 mins Standard Equipment 2x 4.0Ah 18v LiHD Li-Ion Batteries 1x ASC 55 Multi Voltage Charger Warranty click above logo for more details or to register you purchase online