AC Doctor INC Laptop Battery for HP Compaq Presario CQ32 CQ42 CQ43 CQ56 CQ62 CQ72, Envy 15 Envy 17 G32 G42 G42t G56 G62 G62t G72 G72t, Pavilion dm4 dv3 dv5 dv6 dv7 g4 g6 g7, 7800mAh/10.8V/9 Cell

hi this is Sarah - voice with laptop battery express this 9 sell HP battery is rated at 7800 milliamp hours or 87 watt hours and will give you about 3 to 5 hours of runtime depending on your energy use the mah or milliamp hour and the W HR or watt hour indicates how long a battery will run on a charge the higher the milliamp hour and watt hour number the longer the battery will run all of our batteries are brand new with Samsung Power Cells a Texas Instruments computer chip and are never used or refurbished if you're finding less expensive batteries on line please be aware that it's because they use cheap quality power cells inside the cartridge that can easily wear out in six months our batteries typically have a service life of three to five years all batteries from laptop battery Express come with a 30 day money back gaurantee and a full 12 month warranty all of our batteries shipped