BTI Dell Latitude D500, D505, D510, D520, D600, D610 series -10.8V, 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 4400mAh 10.8v lithium-ion battery. Manufactured by BTI and built to the highest quality standards, this battery meets or exceeds the original manufacturer\'s specifications and com..