Originally Posted by
RollCNY
The one in the bundle worked great for me for two indoor riding seasons, but once the battery failed it never worked again. The changing battery protocol recommended by Garmin didn't fix it, and cleaning salt off of the "electronic guts" didn't either. Part of why I am meh on the 500 is the loss of HRM, which was great for indoor training. YMMV.
Contact Garmin. They will replace it. I've had mine fail twice and each time they sent me a new one. The most recent replacement was their new premium strap. What a bargain.
Btw, they recommend washing the new one every 7 uses in the washing machine. I toss it in with a load of cycling clothes on gentle in a laundry bag.