For Laptop Batteries:
Please check your laptop model and/or original battery's part number. Please also compare the shapes, physical appearance, position and orientation of the connector, and latch position of your original battery with our product images to ensure compatibility.
To find laptop model for Windows: Go to Settings --> System --> About, and it will show your laptop model.
To find battery's part number: Please look at part number on the label of your original battery. For examples:
HP: MU06, HT03XL, HSTNN-C51C, 516477-191
Dell: 5046J, JWPHF, P06E
Toshiba: PA5185U-1BRS, PABAS097
Asus: A32N1405, A32-F3, 90-NE51B2000
Sony: VGP-BPS26, VGP-BPS26/B
Acer: AC14B3K, BT.00403.009
Lenovo: 90+, 45N1003, L14M3P21
Apple: A1582, MB471LL/A
For more detailed info and other products including ac adapters or power tool batteries please see How to find correct item page.