AC Doctor INC 5200mAh Laptop Battery Replacement for Dell Latitude D620 D630 D630c D631 Series New replacement laptop battery 6 cells for Dell Latitude D620 D630 D631 laptops and dell precision mobile work stations M2300 312-0393 YD623 185.10x66.45x19.10mm 313.0g. 10.8V and 11.1V is compatible, 14.4V and 14.8V is also compatible. Full compatible with your original battery, brand new direct from Professional Manufacturer. CE UL RoHS certified, safe use.60 days no worry to return or exchange item, 12 months customer service warranty. US local dispatch. Note: Please make sure that the battery part numbers listed in the description matches the battery part number on your original battery before you purchase.