The alternator is responsible for helping the battery retain its charge. How this work exactly? Well, the alternator is connected to a belt system. This system turns and is spun by the turning of the engine. This motion gives the alternator power to recharge the battery as the car is moving. A broken alternator or a broken will then be unable to perform its function of recharging the battery. This will then result to the battery draining faster which in turn to results to loss of power. When the alternator or alternator belt is broken it will need to be replaced by a technician from an Inner West smash repairs shops.