Should I use a single 100-foot extension cord or daisy-chain two 50-foot cords?

Get one continuous 100-foot cord instead of daisy-chaining two 50-foot cords. Daisy-chaining adds resistance, causing voltage drop that makes tools run weaker and could overheat. It also creates extra connection points that are potential failure spots for looser fit, moisture, and tripping hazards. A single cord gives fewer failure points, less voltage drop, and is worth the extra cost.