The 3 Volt CR2025 coin cell battery lasts about 4 to 6 months with normal use. We recommend using the same brand (or one with equivalent quality), which should give you the estimated battery life.
BEST PRACTICES TO MAXIMIZE BATTERY LIFE:
- Keep the app up to date
- Keep Swarovski Activity Crystal’s firmware up to date
- Resist unnecessary tapping of Shine as a party trick