This is difficult to determine. Actual laptop battery running time depends upon
the power demands made by the equipment. The use of the monitor, the hard drive
and other accessories results in an additional drain upon the battery, effectively
reducing its running time. The total running time of the battery is also dependent
upon the design of the equipment. Generally, a new eBatts.com battery will run at
least as long (and usually longer) as your old battery did when it was new.