8-minute run time for 3/8 cordless drill 18 volts

Example:
18 volts Lithium-ion
3/8 inch chuck
Max. Torque: 400 inch-lbs/33 ft-lbs/45 N-m
No Load RPM : 0-400 / 0-1,300 rpm
Clutch Settings : 15 position
Length : 7.7 inch
Weight : 3 lbs
Battery Charger: 45-Minute Fast Charger
 


Cordless drill run time depends on:
- Battery voltage: More volts, More run time

- Battery capacity: More amp-hours, More run time

- Drill Efficiency: More efficient, More run time



How long cordless drill run in a single charge?
?


Run time calculation
actual screws driven: 160 screws (3 inch size) per charge
assume: 3 seconds to drive per screw

Run time = 160 screws x 3 sec/screw

Run time = 480 sec

Run time = 480 sec/60 sec per minute

Run time = 8 minutes