Coolgo Generic New Laptop Battery Replacement for HP PR06 PR09 HSTNN-OB2R HSTNN-DB2R HSTNN-OB2T HSTNN-IB2R HSTNN-LB2R HSTNN-I02C HSTNN-Q89C ProBook 4330s 4331s 4430s 4431s 4435s 4436s 4530s 4535s - 18 Months Warranty [li-ion 6-cell 10.8V 5200mAh BLACK] New 10.8V 5200mAh BLACK high quality battery for HP Probook 4530s 4330s 4331s 4430s 4431s 4435s 4436s 4535s Series Laptop Notebook Compute PR06 PR09 HSTNN-OB2R HSTNN-DB2R HSTNN-OB2T HSTNN-IB2R HSTNN-LB2R HSTNN-I02C HSTNN-Q89C. Quality Certication: All the products pass the ISO9001, CE and ROHS, FCC multiple international authentication and completely accord with environmental protection requirement. Consummate Design: Excellent design makes the product not only has the overcharge, discharge and short circuit multiple protection, but also to balance charge-discharge of all the internal cells. Environmental Test: Standard modern assembly line. All products have passed a variety of charge-discharge and aging test before they leave the factory. 100% quality test for all items. Operation time: For standard battery(6-cell, 4400mah): 2-3 hours; for extended battery(12-cell, 8800mah): over 4 hours (Note: The actual operation time depends on how much electricity is required by the device and how you use the battery.)