Brand new and are 100% compatible to meet OEM specifications for safety and efficiency. Same size as original battery, Don't worry about assembly and adaptation issues.

Grade A battery cells. When it comes to laptop batteries - it all boils down to the battery cells inside.

Only compatible with some of the Dell Inspiron 15 17 7000 series models-Inspiron 7773 7778 7779 7786 7577. Please find out your specific model name! (E.g.Inspiron 15 7000 series 7577). You may purchase the wrong battery if you only base on the laptop series!

To purchase the correct replacement battery for your laptop, follow these steps:

1. Check your specific laptop model name by pressing [Win] + [R] key and entering [msinfo32] or [dxdiag]. Click OK to find your system model. Use your laptop model name to find the correct replacement battery.

2. Check your original battery's type model and shape by removing the laptop back cover. Use this information to search for the replacement battery.

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