The run time for these drills, whenscrewing 1" Screws into pine 2x4, is as follows:
FS1200D-2 - 420 screws
FS1400D-2 - 512 screws
FS1800D-2 - 868 screws
FS2400D-2 - more than 850 screws Run time may vary due to battery age and condition.
All run times quoted are on a fully charged battery in new or near new condition.