BTI HP Business Notebook 6100, 6200, 6300, 6400, 6510b, 6515b, 6710b -14.8V, 3600mAh -8 Cells Retail Box 18 months warranty Product DescriptionNeed a battery for your laptop/notebook? BTI has you covered with the premium 8 cell 3600mAh 14.4v lithium-ion battery. Manufactured by BTI and built to the highest quality standards, this battery meets or exceeds the original manufacturer\'s specification..