We are not allowed to put a 24V battery directly into a 12V car, which may lead to many problems.

Using a 24V battery directly may cause serious consequences

The electrical system that we usually use in our small cars is 12V, and if we use a 24V battery, the voltage difference is too big, which may lead to serious consequences.

Using a 24V battery will cause a lot of damage to the wiring on the vehicle, which are designed to be used at 12V, and the greater voltage difference will bring about a greater current, which may overload the circuitry, and the excessive voltage will also cause the wiring to short-circuit or spark, which may cause a fire or explosion. So, in the absence of any protective measures, this practice is clearly unwise.

A large difference in voltage means that the electrical system has to accept more voltage than it can handle, which can overload the electrical system and cause damage to the engine and other equipment, as well as abnormal heating, causing the engine to fail, and also affecting the lights, air conditioning and other electrical systems.

Secondly, the 24V battery may also be unable to match the car and become hot, seriously affecting the performance and service life of the battery.

How to safely use a 24V battery in a 12V car

If you want to use a 24V battery, you can find a professional to modify your car wiring and components so that your car can withstand 24V voltage to avoid safety problems, which will prevent private modifications from affecting your car warranty.

Of course, the best solution is still to use a 12V battery to power your car to avoid any other unwanted problems and it will be safer as well.