This battery is essential to retain your save data. If the battery dies, your save data will be lost.
Here are some important things to keep in mind:
* Battery Life: These batteries have a limited lifespan. The older the cartridge, the more likely it is that the battery is nearing its end.
* Save Data Loss: When the battery dies, you will lose all your game progress, including your Pokemon, items, and story progress.
* Battery Replacement: You can have the battery replaced by a qualified technician, but this can be expensive.
* Battery Saver Devices: There are devices available that can help extend the life of your game's battery.
Therefore, it's important to be aware of the battery in your Pokemon Red cartridge and take steps to ensure its longevity or to have a backup save in case it dies.