Cordless means operating without being physically connected to an electrical outlet by a cord or wire. A cordless phone lets you walk around your house while talking because it runs on a rechargeable battery instead of being plugged into the wall. A cordless drill gives a carpenter freedom to move anywhere on a job site without dragging an extension cord behind them.

Before cordless devices became common, people were literally tethered to walls. A corded telephone kept you standing in one spot during conversations. A corded vacuum cleaner meant constantly unplugging and moving to different outlets as you cleaned different rooms, and you could only reach as far as the cord allowed.

The invention of small, powerful rechargeable batteries made the cordless revolution possible. Today we use cordless keyboards, cordless earbuds, and cordless power tools. The trade-off is that cordless devices need recharging: eventually the battery runs down and must be plugged in again. Still, the convenience of moving freely usually outweighs the occasional inconvenience of recharging.

Cordless technology has transformed how we work and communicate, giving us mobility that previous generations couldn't have imagined.