Summary

This allows you to keep your mares puck battery on the wrist strap instead of leaving it in the computer to slowly drain to death.

You have to slide the battery in first and then move it down into the rounded cavity, then the strap keeps it from coming out again. You should probably also put the strap through the buckle so there is no chance of losing the battery. Enjoy!

This may work for other devices using a 2450 battery and which have a strap 26mm wide or less.