Battery type: Li-ion; Cells: 6-cell; Capacity: 5200MAH; Voltage: 11.1V The battery is durable and has overcurrent protection, anti-overcharge, anti-overdischarge and temperature control functions. Compatible laptop Models HP EliteBook Series 6930p, 8440p, 8440w HP ProBook Series 6440b, 6445b, 6450b, 6540b, 6545b, 6550b, 6555b HP Compaq Business Notebook Series 6530b, 6535b, 6730b, 6735b Battery For HP Compaq 6530b 6535b 6730b 6735b series fits HSTNN-IB68 HSTNN-IB69 HSTNN-CB69 HSTNN-UB68 Laptops 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. You can buy it with confidence and use it safely. Warranty & Support: Full refund in 30 days, 12 months warranty. If any issues about the prod