Specifications: - Voltage: 10.8v - Capacity: 4400 mAH - Brand: Unbranded /OEM Compatible Models: HP COMPAQ PROBOOK 4440S HP COMPAQ PROBOOK 4441S HP COMPAQ PROBOOK 4445S HP COMPAQ PROBOOK 4446S HP COMPAQ PROBOOK 4530S HP COMPAQ PROBOOK 4535S HP COMPAQ PROBOOK 4540SHP COMPAQ PROBOOK 4330S HP COMPAQ PROBOOK 4331S HP COMPAQ PROBOOK 4430S HP COMPAQ PROBOOK 4431S HP COMPAQ PROBOOK 4435S HP COMPAQ PROBOOK Compatible Part Numbers: HSTNN-XB2E, HSTNN-XB2F, HSTNN-XB2G, HSTNN-XB2H, HSTNN-XB2I, HSTNN-XB2N, HSTNN-XB2O, HSTNN-XB2R, HSTNN-XB2T, HSTNN-XB3C, K646AA, LC32BA122, PR06, PR06Q, PR09, QK646AA, QK646UT, QK647AA 633733-151, 633733-1A1, 633733-321, 633735-351, 633805-001, 650938-001, HSTNN-DB2R, HSTNN-I02C, HSTNN-I97C-3, HSTNN-I97C-4, HSTNN-I98C-5, HSTNN-I99C-3, HSTNN-I99C-4, HSTNN-IB2R, HSTNN-LB2R, HSTNN-OB2R, HSTNN-OB2T, HSTNN-Q87C-4, HSTNN-Q87C-5, HSTNN-Q88C-4, HSTNN-Q88C-5, HSTNN-Q89C, What's in the box Laptop Battery