Fit a fully charged battery to your cordless screwdriver. Select screws appropriate to the material you wish to fasten. Select the lowest torque setting on the screwdriver by rotating the collar at the chuck end to the lowest number.
Insert a suitable screwdriver bit into the chuck of your screwdriver, the type required for your particular screws will be specified on the package that the screws came in.
Hold the screwdriver in your dominant hand and hold the screw in place over a pre-marked point or pre-drilled pilot hole with your other hand. Engage the screwdriver bit in the head of the screw.
Apply some pressure to the screwdriver and gently squeeze the trigger to begin driving the screw. Do not push on too hard, let the screwdriver do all the work. Drive the screw home until the screwdriver stops turning and begins to click.
If you require the screw to be driven in tighter, adjust the torque ring a few stops higher and drive the screw again. Repeat this process until the screw is secure.
Fit a fully charged battery to your screwdriver. Select and fit the appropriate screwdriver bit for the screw you wish to remove; it should fit snugly in the screw head without any slack.
Select the highest torque setting by rotating the collar at the chuck end of your screwdriver. Use either the highest number or the "drill" setting if it has one (this is a small icon that looks like a drill bit).
Engage the screwdriver in the head of the screw, apply firm pressure and gently squeeze the trigger to begin removing the screw. Once the screw has started to come out reduce the amount of pressure applied. Continue until the screw is completely removed.