Go to Amazon Sites : http://www.amazon.com/gp/product/B007R8KSPA?tag=shitmycatsrea-20

HP COMPAQ Pavilion dm4-1173cl Pavilion dm4-1180ef Pavilion dm4-1180sf Pavilion dm4-1200 Pavilion

Type Li-Ion Voltage108v Capacity8800mAh12 cells
1 year replacement warranty30-day refund guarantee after the purchase
High Capacity Replacement battery
Each Superb Choice battery was tested at an original laptop by the manufacturer
If your original battery is a 6-cell battery this 12-cell battery has much higher capacity and works longer hours after each charge However it is bigger heavier and sticks out due to the extra 6 cells It will still fit in your laptop