You should be able to replace the alternator belt meanwhile by heading to an auto parts store and purchasing a replacement. You can then try to install it yourself or try contacting a mechanic to do so for you if you are not confident enough yourself. If not then you may have to try charging your car using a car battery charger which works much like a jump start – supplying your car with energy from an external source – except for it can be left to run for a long period of time meaning it can completely charge the battery rather than just doing so partially. If you leave this overnight then your car battery should be completely charged by the next day.
You should also try connecting a multimeter or a voltage meter to test the alternator while the engine is idled. You should find that the readout is somewhere between 13.6 and 14.3 volts. If not then your alternator is likely to be the problem.
Another quick test is to try revving the engine while getting someone to watch the car headlights. If the car headlights get brighter as the engine is revved then this is usually a sign that the alternator is charging the battery still and that the problem is with the battery rather than the alternator.
If you are unsure then you should probably check with a mechanic. However if you would rather avoid the expense of a mechanic you can use these checks, and if you remain in doubt then try changing the battery first as this is significantly cheaper than trying to replace the alternator.
If you are looking for an alternator for your vehicle you should look on our auto parts store online. Use can also use an auto parts store to shop for the other tools you may need here such as the car battery charger or multimeter. You should also look to buy protective eye wear if you are working under the bonnet of your car.