Click here for a video on how to remove the cap.
Click here for a video on how to install a battery.
Click here to see the video on how to install the battery and calibrate the unit.
Tempo App for Android
Click here to get the Android App for Tempo Dual Mode Power Meter. Only available for models that have "Dual Mode" on the case label. This app will allow you to update the firmware, adjust the power, calibrate, and view battery status.