Polar RS100 Heart Rate Monitor

You will have to contact Polar and buy a replacement. Go here:

http://www.polarusa.com/us-en/support/contact_us/email_polar

The strap is included

My daughter in-law had a battery store change hers but Ryan is correct, if you do not send it to Polar the warranty is void if that really matters.

You may be able to get the back off of the wrist unit to change the battery. I was. However, the waterproof-ness of the unit might be compromised. The transmitter battery is potted in. When it goes dead, the transmitter is useless and you can throw it away. There is another transmitter available that has replaceable battery and will work with your RS100. It is called a "wear link" transmitter.

No and it's not easily replaceable I recommended when the battery has run out; contact the authorized Polar Service Center in your area.

make notes, enter data, target workouts by typing them in in "diary" once you register. It's easy, I do it every session.

The coded T31 transmitter is included, as stated in the specs above.The way the watch and computer talk is called Uplink. It is software that utilizes the computer's sound card and speakers to facilitate communication. Generally the speakers that are found on laptops do not work.I used it with success on an older Polar watch with separate desktop speakers.

Unless you're a slim, athletic woman with really fat wrists, you should be set.