Product description In order to deploy the maximum battery capacity, use the battery directly till 7% of the remaining power, turn off laptop and then charge it for at least 12 hours. Repeating this complete charge cycle 2-3 times will fully exercise and optimize the battery's maximum performance capacity. This high quality laptop battery replace for below original batteries: Please confirm that your laptop battery part number is one of the following three part number, otherwise it may not be compatible with your computer: VGP-BPL24 VGP-BPS24 VGP-BPSC24 Fit laptop computer models as below: SONY VAIO SA Series SONY VAIO SB Series SONY VAIO SC Series SONY VAIO SD Series SONY VAIO VPCSA Series SONY VAIO VPCSB Series SONY VAIO VPCSC Series SONY VAIO VPCSD Series What's in the box BLESYS 11.1V 4400mAh Laptop Battery