In order to change the battery in the Moki Band you will need: 

1. A new CR 2032 battery 

2. A thin coin 

3. A pin or hair clip

When the Moki Band runs low on battery a warning will appear in the app. To change the battery in a Moki Band simply unscrew the back casing using a thin coin. Then dislodge the old battery using a pin or hair clip and remove it from the casing. Now insert the new CR2032 battery, return the back casing and screw tightly using the thin coin.