Firstly, ensure the battery is properly connected and terminals are clean and tight. Check the voltage output using a multimeter; it should be around 12.6 to 13.2 volts for a fully charged battery. If voltage is significantly lower, recharge the battery using an appropriate charger. If the voltage remains low after charging, the battery may be nearing the end of its lifespan and requires replacement. Additionally, inspect the battery for any signs of physical damage or leakage, as these can also affect performance. If you’re still experiencing issues, it’s best to consult with a professional technician for further diagnosis and assistance.