1.1 Description 21.6V battery replacement 1860 lithium ion pack for Dyson V7 Vacuum Cleaner strong power 1.2 Cell Model 18650 li-ion battery cell 6S1P 1.3 Typical Capacity 2500mAh 1.4 Typical Voltage 21.6V 1.5 End of Charge Voltage 25.2V 1.6 Charge Current 0.5C 1.7 Charging time 2-3 Hours 1.8 End discharge Voltage 15.0V 1.9 Wide compatibility Dyson V7 Animal, Absolute, Motorhead, Fluffy Vacuum Cleaner. 2.0 Charging cycle more than 300 times 2.1 Over-discharge Voltage Protection cell 2.5V 2.2 Over-Current Discharge Protection YES 2.3 Short circuit protection YES 2.4 Dimension 123*80*121mm 2.5 Weight 0.47kg 2.6 Operation Temperature Range Charge 0~45 C, Discharge -20~60 C