Battery run-time on the PAVILION DV1000 SERIES Notebook is difficult to determine. Actual PAVILION DV1000 SERIES battery running time depends upon the power demands made by tde equipment, the use of the screen, the hard drive and other accessories results in an additional drain upon the HP battery, effectively reducing its running time. the total run-time of the battery is also dependent upon the design of tde equipment. Generally, a new Hi-Capacity PAVILION DV1000 SERIES battery will run 30% to 50% longer than the old battery did when it was new. The life span of a PAVILION DV1000 SERIES notebook battery is about 1.5 to 3 years under normal conditions.As the rechargeable PAVILION DV1000 SERIES battery begins to die, the user will notice a decline in the running time of the battery Cycle life is measured by the amount of times a PAVILION DV1000 SERIES computer battery may be charged and discharged. Every time a battery is charged and discharged, it uses one cycle. Cycle life is very important in battery applications such as laptop batteries and emergency light batteries