BTI HP Compaq 6720s, 6820s -11.1V, 4400mAh -6 Cells Retail Box 18 months warranty 

Product Description
Need a battery for your laptop/notebook? BTI has you covered with the premium 6 cell 5200mAh 11.1v lithium-ion battery. Manufactured by BTI and built to the highest quality standards, this battery meets or exceeds the original manufacturer's specifications and comes with an industry leading 18 month warranty.

This product is compatible with the following OEM part number(s):
•HP 360483-004 •HP 364602-001 •HP 365750-004 •HP 372772-001•HP 383220-001
•HP 393652-001  •HP 443885-001 •HP HSTNN-CB28 •HP HSTNN-DB28
•HP HSTNN-FB28 •HP HSTNN-IB18 •HP PB994A •HP PB994UT

Specifications
• Product Type-Notebook Battery
• Brand Name-BTI
• Manufacturer-Battery Technology, Inc.
• Product Model- HP-NC6200
• Battery Capacity-5200 mAh
• Battery Rechargeable-Yes
• Battery Chemistry-Lithium Ion (Li-Ion)6-cell
• Output Voltage 11.1 V DC

Compatibility
HP 6510B; Business Notebook NC6110, NC6120, NC6200, NC6220, NC6230, NC6400, NX6105, NX6110, NX6115, NX6120, NX6125, NX6310, NX6320, NX6325