Replace your battery with a new WW8N8 battery. This WW8N8 battery is compatible with the Latitude 7340, 7440 and 7640 models. Go to our Dell battery page for the full list.

This Dell WW8N8 battery is rated 11.4 volts and 57 Whr. It will normally last 5 hours on a full charge.

We use the highest quality lithium-ion battery cells that charge faster, last longer and weigh less. Our batteries last nearly 6 times longer than cheaper, lower quality batteries. We're so confident in our quality that we back each Dell battery with a 2 year warranty and 30 day money back return.