stopwatch features on calculators

[xerxes]

I'm still using the FX-8100 since 1980 as stopwatch, timer and alarm clock. A very nice calculator with fast operation and responsive keys.
The range of stopwatch and timer is up to 10 hours with a resolution of 1/100 sec. The stopwatch is circular with one lap and the timer
can be set to once or recurrent mode. The power consumption is around 5µA even while the running stopwatch or timer.
http://mycalcdb.free.fr/main.php?l=0&id=5456