A button/coin-shaped battery is used in the remote controller of the appliance.
If the battery tray is not secured firmly, stop using the appliance instantly and keep it away from children.
Do not swallow the battery.
If you accidentally swallowed the battery, go to the doctor immediately for emergency treatment. If you fail to receive first aid within 2 hours after you swallowed it, you may experience damage to your internal organs or death in severe cases.