TECHNICAL DATA: Parameters Battery voltage: 18 V Battery capacity: 4 Ah Energy: 72 Wh Weight: 685 g Intelligent battery management ensures long battery life with a 3-year warranty Patented "AIR COOLED" charging technology Continuous electronic cell monitoring system during charging (ESCP) ensures very long battery life battery life. Processor-controlled management of charge and discharge cycles Battery capacity indicator for constant monitoring of the charge status Long storage life with minimal self-discharge **