Even though battery problems are mostly caused by cold weather, Consumer Reports magazine says that heat is the bigger enemy of car batteries and it makes a big impact on its performance and reserve capacity. The magazine recommends that vehicle owners who live in the hotter parts of the world get their car batteries tested after two years of ownership and then every year after. And those who live in the colder regions may wait four years to get the battery performance and capacity tested, and then every year after.
The fact is, heat kills batteries, and given that we live right on the edge of the equator, it does not do us any good. Our batteries are more prone to wear from heat, let alone anything else. Since winter is around the corner, many of us will have trouble starting the engine in the morning. This is solely because the heat of the past summers has weakened the battery. To have a better explanation of the situation, when you try to start the engine in the cold, the starter motor requires more electrical current to turn over since the engine oil inside the engine has thickened due to the cold outside.
Testing a battery's performance and reserve capacity is not just a matter of seeing whether it will hold a charge for an Acid-Lead battery or checking the electric eye, but to see if it is green on a Lithium-ion battery. If you can get hold of a multi-meter, you can check the battery's performance at home. But for best results, we recommend that you take it to a battery shop to get it tested.