Question adding a second ssd to laptop

[bobbee25]

If I add a 500gb PNY SSD as a second drive in my laptop, will it have much effect on the battery duration ? I am presently getting around 5-6 hours,
The drive info states ultra low power consumption

 

[velocityg4]

SSD typically use about 50 mW when idle and about 2 W under load. As it will likely be idle most of the time. It might shave a few minutes off the run time off a typical 40 W battery.