Universal external laptop battery for all laptop

Universal external laptop battery------High capacity, Long steady time, Long life cycle, Lower self-discharge, Excellent securityItemSpecificationCapacity4000mAh/8800mAhVolts14.8vCells8 18650 cells/16 cellsCycle lifeMore than 500 cyclesChemistryLithium lon(Li-on)Dimension155×100×23mmOutput voltage16v and 19v DC switch selectableMax. Charge Voltage16.8VOver-charge protection4.35V±0.025V(one cell)Over-discharge protection2.4V±0.08V(one cell)Charging Temperature0 45Discharging Temperature-20 60Relative Humidity<93%Protection ICS-8254Net Weight500gCase ColorBlackWarranty1 year Smart LED indicator:25% LED flicker : Turn off the laptop before battery power off16v,19v : Choose output voltage by pressing 16v/19v swith, the LED will indicate .The LED will indicate battery capacity 100%-75%-50%-25%Device accessories Please confirm that you get the following accessories. Name Qty Specification Universal external battery 1 14.8V--4400/8800mAH Adapter with power cord 1 Input:AC100-240V 50/60HZ Output: 16.8V--1.5A Transform cable 1 Connector 8 Manual 1 Illuminate how to use , indicate which model laptop use which connector.