PRODUCT SPECS: CS03XL ; Battery Type: Li-ion ; Voltage: 11.4V ; Capacity: 48Wh ; 4 A+ Cells. With Two Free Screwdrivers. 100% Brand New. If you are not sure about the model, please contact the CUSTOMER SERVICE through the 'Ask a question' window on the right corner of the store page. Response will be reached in 24h. REPLACEMENT P/N: CS03 CSO3 CS03XL CSO3XL HSTNN-I33C-4 HSTNN-I33C-5 HSTNN-I41C-4 HSTNN-I41C-5 HSTNN-IB6Y HSTNN-UB6S 3ICP6/65/79 800231-141. COMPATIBLE MODELS: HP Elitebook 745-G3 745-G4 755-G3 755-G4 840-G3 840-G4 850-G3; HP ZBook 15u-G3 15u-G4.Your could press [Ctrl + F] to search your laptop model/part number All batteries are certified by UL-/CE-/FCC-/RoHS. As a professional laptop accessories manufacturer with decades of experience, we have been committed to providing customers with better products, constantly overcoming technical problems. If you have any doubts about laptop accessories, we are happy to serve you. Customer first is our aim.