Wasserstein WTag User Manual page 4

Battery
The WTag necessitates the use of a CR2032 battery, which
might require replacement over the course of its lifespan. When
replacing the battery, ensure that only the same type and rating
of battery with the correct polarity are used.
Replacing the battery
1. Open the back cover through the gap between the top and
bottom cover.
2. Remove the existing battery.
3. Insert the CR2032 battery into the device with the positive (+)
side facing up
4. Assemble the top and bottom cover and press tightly.
CR2032
page 3