Car won't start properly? Most likely the car battery is faulty due to old age or the battery is the wrong size for your vehicle. On those cold winter mornings it is common for batteries to fail. It is always a good idea to get your battery checked or replaced as soon as you notice the engine is not starting as quickly as it should. At Batteryworx NZ we can test your battery and replace the battery if necessary with the correct battery that will last for many years. Call us or visit our store in Onehunga, or view our website and BUY On-Line.