1800mAH 3.7V (6.66 WHr), fits HP JORNADA 520/525/540/545/547/548, Model 540, F1823A, Model 545, F1824A, non-oem, 1LP046520994, F1798-60918, F1798-80003, F1798, Run time may vary depending upon LCD Brightness and other factors not related to the battery...