What is difference between a mechanical stopwatch and an electronic stopwatch?

A mechanical stopwatch can measure a time interval of up to 0.1 seconds. It has a knob that is used to wind the spring that powers the watch. It can also be used as a start-stop and reset button. The watch starts when the knob is pressed once.

The Electronic Stopwatch keeps time for an unlimited number of splits and registers 1/100th for the first 30 seconds, and 1 second . thereafter for up to 24 hours. It includes a programmable alarm, and displays the current date, time and month.