Catrin-yes, I believe the battery is in the chest strap. I went online to look at their instructions and it says that the battery is "plugged" right into the top piece for water protection purposes. Ok, I can handle that.

Next question...

When it says to throw the whole thing in the washer without soaking, spinning dry etc. How do you do that? My washer tempoarily soaks while it is getting its water, it spins in between wash and rinse cycles.. Do you just hand wash yours?

Thank you
Red Rock