The “Normal” Life of a Car Battery.

Most battery performance claims are based on normal conditions. “Normal” in this case means the battery goes through full charge cycles, isn’t subjected to extreme temperatures, is attached to a reliable and consistent charging system and isn’t providing power for a ton of accessories. Of course, we all know that real life is anything but normal.
Pretty much everything that happens inside your battery relies on a fairly simple chemical reaction. But there are hundreds of factors that can make that simple reaction a complicated task. Vibrations can shake loose or damage a battery’s plates. Extreme heat and cold can have a huge effect by speeding or slowing the reaction. Starting the car takes a huge jolt of electricity, so the charging system has to step in to replenish the battery. If you have a short commute or take mostly brief trips, the battery never gets fully charged.
The battery is the silent hero of your electrical system, always there when you need it – until it isn’t. That’s why it’s important to get your battery tested regularly, especially as the battery reaches the 4 to 5 year mark and during times of extreme temperatures. Most modern batteries will live up to and often exceed the manufacturer’s performance claims but it’s always good to remember that “normal conditions” and real life can be two very different things.