Firstly, ensure that the battery is properly connected to the fire alarm system. Check the terminals for any signs of corrosion or loose connections. If everything looks good physically, measure the voltage output of the battery using a multimeter. It should read around 12 volts for a fully charged battery. If the voltage is significantly lower, the battery might need recharging or replacement. Additionally, inspect the surrounding environment for any factors that could affect the battery’s performance, such as extreme temperatures or moisture. If the issue persists, it’s best to consult the manufacturer’s guidelines or contact technical support for further assistance.