Battery Type: Li-Polymer; Capacity: 7800mAh; Cells: 9-cell; Voltage: 11.1V The battery is durable and has overcurrent protection, anti-overcharge, anti-overdischarge and temperature control functions. Fit Part number:FV993 0FVWT4 0TN1K5 312-1176 312-1177 312-1178 3DJH7 451-11742 451-11743 451-11744 97KRM 9GP08 FV993 KJ321 PG6RC R7PND X57F1 Replacement for: DELL Precision M4600 M4700 M4800 M6600 M6700 M6800 Laptop Battery. Security & Reliability: Our batteries are assembled from top quality material and circuit boards to ensure fast charges and low power consumption, 100% New from Manufacturer, Overcharge and Overdischarge Circuit Protection, Over-temperature and Short-circuit Protection, up to 500 recharge cycles over the life of the battery, meet OEM standard. Warranty & Support: Full refund in 30 days, 12 months warranty. If any issues about the product within 365 days, click the button "ASK A QUESTION" and CONTACT US, we will respond within 24 hours via emails and gi