The 12v battery charger is used throughout the entire world. Most vehicles use 12V lead acid batteries and its a standard voltage found in many electric installations. Wherever you go, you wont be surprised if you find a 12v battery charger.
If your car doesnt start in the morning, most likely due to a discharged battery, a simple12v battery charger will be enough to bring it back to life. If its a lead acid car battery just be sure to check the distilled water level inside it or else it might not even charge at all.
Whether for a car, a motorcycle, or even an electric model plane, the 12v battery charger will continue to be a valuable tool for many years to come. They can be found so cheap these days that not having one isnt even an option. On the other hand, if you plan to use it for more than just emergencies, maybe spending a few extra bucks and acquiring a more advanced smart charger might prove to be a better choice.