The Baby FM thermometer is powered by one CR2032 3 V lithium coin cell. The battery is not rechargeable and lasts at least 30 days of measuring when new.

• Check the current battery level in the app. Replace the battery when the app notifies you (at or below 20 %), or if the device fails to power on after the battery has been inserted correctly.
• A continuously blinking internal light, visible when the battery cover is open, also means the battery needs replacing.
• Do not attempt to recharge the battery. Charging a CR2032 may cause overheating, leakage or explosion, resulting in injury or damage.
• Replace only with a CR2032 primary lithium coin cell from an approved supplier, and observe polarity. Other types, rechargeable cells or unknown brands may cause overheating, leakage, explosion, inaccurate readings or malfunction.
• Do not use a damaged, deformed or leaking battery.
• Keep coin cells away from children — they are a choking and ingestion hazard. If a battery is swallowed, seek immediate medical attention.
• Dispose of used batteries in accordance with local regulations, never in household waste.

For the replacement procedure, see Battery Replacement.