No, it is not recommended to spray your car battery with Mass Air Flow (MAF) sensor cleaner. The MAF sensor cleaner is specifically designed to clean delicate components inside Mass Air Flow sensors, which are responsible for measuring the amount of air entering the engine.

The car battery, on the other hand, is responsible for providing electrical power to start the engine and all other electrical components in the vehicle. It does not have any delicate sensors or sensitive components that require cleaning with MAF sensor cleaner.

Instead, you can keep your car battery clean by regularly inspecting it for any signs of corrosion on the terminals (where the battery cables connect to the battery) and cleaning it with a mixture of baking soda and water. Corrosion can hinder the flow of electrical current, so it's important to keep the battery terminals clean for optimal performance.

If you suspect any issues with your car battery, such as low voltage or difficulty starting the engine, it's best to consult with a professional mechanic who can perform a proper diagnosis and recommend the necessary steps to resolve the problem.