ELECBRAiN New Laptop Battery VI04 Replacement for ProBook 440 G2 450 G2 Series,HP Envy 14-v000-v099 HP Pavilion 15-p000-p099 756745-001 756479-421 HSTNN-DB6K HSTNN-LB6J HSTNN-LB6K Battery Type: Li-ion || Voltage: 14.8V || Capacity: 2200mAh || Cells: 4-cell Replacement Battery for HP ENVY 756479-421 756478-851 756745-001 88182750117 G6E88AA G6E88AAABB Please note that it only fit for 4Cell 14.8V HP ProBook 440 G2 450 G2 battery,it doesn't fit for 6Cell 10.8V HP ProBook 440 G2 450 G2 Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Elecbrain is focus On Providing Quality Power Products and Excellent Customer Service,24 x 7 Email Support,12 Months warranty, 30 Days Money Back Guarantee!Buy with confidence!