DTK Laptop Battery Replacement Hp Probook 4330s 4331s 4430s 4431s 4435s 4530s 4535s 4536s 4440s 4441s 4446s 4540s 4545s Series [6-Cell 10.8v 4400mah] Notebook Battery Battery type: Li-ion; Capacity: 4400mAh; Cells: 6-cell; Voltage: 10.8V. Compatible Models: HP ProBook 4330s / 4331s / 4430s / 4431s / 4435s / 4436s / 4440s / 4441s / 4445s / 4446s / 4530s / 4535s / 4540s / 4545s Compatible Part Numbers PR06 / PR09 / QK646UT / 633805-001 / HSTNN-DB2R / HSTNN-LB2R / HSTNN-OB2R All DTK products are Certified by CE, FCC for safety. Strict guidelines for compatibility, and standards compliance for environment safety.Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Operation time for standard batteries(6-cell, 4400mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support, 12-month hassle-free warranty. Overheating protection Overcurrent protection Overvoltage protection Overcharge protection Over discharge protection Short circuit protection Excellent discharge curve and low resistance Excellent stability Long work life More safety CE FCC ROHS PSE Brand Name: DTK Capacity: 4400mAh/49Wh Cells QTY: 6 Voltage: 10.8V N.W.310g Battery Type: Li-ion ColorBlack Compatible Laptop Brand: Dell Package List: Laptop Battery + Instructions