Batteries for Electric and Gas vehicles. Batteries come in a wide variety of voltage, amperages, and dimensions. While batteries come with a certain brand name, the brand name is not relevant; only the voltage, amperage, and dimensions are. The guiding rule is you want to use the same amperage as what you currently have in your vehicle, but you can go within 1 to 2 amps of what your current battery is. Be sure to pay close attention to the dimensions. You can have a battery that matches your voltage and amps, but when you go to put it in your scooter it may be either too large or too small.