To make sure that the battery you purchased is the correct one, please check the model of your laptop and the original battery part number at first. Replace Part Number: WDX0R Fit for: Dell Ins piron 15 5568 7560 5567/13 7368 Series Ins piron 13 5378 14-7460 17-5770 Ins piron 13 5379 Ins piron 15 7570 Series specification: Voltage: 11.4V Capacity: 42Wh Colour: Black Battery type: lithium ion battery Please note: 1. The new battery needs to be charged and discharged for 3-4 cycles, and it takes about 7-8 hours to fully activate the lithium ion to reach the maximum space. 2. Please do not let the battery discharge until the computer is turned off, otherwise it may be easily damaged and may not be fully charged. 3. If the external power supply is connected for a long time, remove the battery. 4. If you do not use the battery for a long time, please charge 80% or more per month.