On Mon, 26 Jun 2000, Dan Michaels wrote:

> Funny thing you should mention exercise machine here. You've
> probably seen the Polar heart rate monitors. The h.w. inside the
> chest belt will signal heart rate to about 200 bpm - and run for
> months off a sealed-in lithium battery <-- presumably Li, since

Try years. I just replaced the battery in my (Li CR2032 IIRC, $1.20 at Fry's)
after 5 years of use. I knew it was about time to change my battery when my
respiration rate started exceeding my heart rate. Also, I've never sprinted up a
200' hill and kept my h.r. below 80 bpm!