Vessel electric screw driver is by far the best purchase I've made on tools, Did a retro fit on a old conventional simplex panel to addressable system and was swaping 50 smokes and 20 pull stations out and I can tell you I was at least twice as fast as the other 3 technicians on the job. I have always carried a Cordless Screwdriver like the Dewalt 8V MAX Gyroscopic but always find my self grabing a regular screw driver to torque stuff down on the last few turns and this eliminates that completely. the torque on this thing is perfect for what we do in alarm industry.

​

https://www.amazon.com/VESSEL-Rechargeable-Screwdriver-No-220USB-1U-220USB1U/dp/B09C2W1NRY