When a car battery dies unexpectedly, you don't necessarily have to rush out to get a new one - often all you need is a battery charger to bring it back to life. A car battery can be discharged for many reasons, for example, it has been used for a long time and is tired, the engine has been turned off but the lights and car radio are left on, it has been bitterly cold outside, etc. In order to find the right car battery charger for you, you need to pay attention to your vehicle's battery type, capacity, voltage and the strength of the charger's charging current. Various additional functions such as a built-in ammeter, a quick charge function and a start function also come in handy.