Laptop Battery - for HP Probook 4320 Series, 4320s Series, 4321 Series, 4325s Series, 4320t Series, 4420s Series, 4425s Series, 4321s Series, 4520 Series, 4520s Series, 320 Series, 321 Series, 420 Series, 421 Series, 620 Series, 621 Series, HSTNN-CB1A, HSTNN-CBOX, HSTNN-DB1A, HSTNN-Q78C, HSTNN-Q78C-3, HSTNN-IB1A, HSTNN-Q78C-3, HSTNN-Q78C-4, HSTNN-Q78C-4, HSTNN-Q81C, HSTNN-UB1A, HSTNN-W79C-5, HSTNN-W79C-7, HSTNN-LB1B587706-761, HSTNN-LB587706-121 Do you need to improve the battery life of your laptop? This laptop battery PATONA for HP ProBook 4320s, 4400mAh, Li-Ion, 10.8V is a power supply replacement for selected Compaq and HP laptops. A laptop without enough power or a power cut will not be your problem anymore. A spare laptop battery is suitable as a second battery for your travels when you can't access an electrical outlet, but still want your laptop to stay switched on. The battery consists of 6 × high-quality cells and offers a capacity of 4400mAh....