What safety warnings should I be aware of regarding the remote control battery?

The remote control contains a coin/button cell battery that is a chemical burn hazard — if swallowed, it can cause severe internal burns in just 2 hours and can lead to death. Keep new and used batteries away from children, and if the battery compartment does not close securely, stop using the product and keep it away from children. Seek immediate medical attention if you think a battery has been swallowed. (Page 3)