Battery Killers: How to Avoid Draining Your Power

Batteries are essential for powering many of our devices and equipment, but did you know they don’t just die—they get killed? Just like any piece of machinery, batteries can wear out prematurely due to certain factors that put unnecessary strain on them. If you want to maximize the life of your batteries and keep your equipment running smoothly, it’s crucial to understand what causes premature battery failure and how to prevent it. Here are two of the most common “battery killers” and some tips to keep your power sources strong and reliable.

Killer #1: Overheating

Heat is one of the biggest enemies of battery life. When batteries get too hot, it accelerates the chemical reactions inside them, which can lead to faster degradation of the battery cells. Overheating occurs when:

  • Charging and using a battery both generate heat. The more you use and charge a battery, the more heat builds up.
  • Frequent short charges without giving the battery time to cool down increase heat buildup and can cause stress on the battery.
  • Using a battery that’s too small for the task at hand makes the battery work harder, which generates more heat and increases the chance of overheating.

Tip: To prevent overheating, make sure to give your battery time to cool down between uses and charging cycles. If possible, choose a battery that is properly sized for your equipment to avoid putting unnecessary strain on it. Proper sizing not only ensures your equipment performs optimally, but it also helps keep the battery at a safe operating temperature.

Killer #2: Deep Discharge

Pushing your battery to its limits can result in a “deep discharge.” This occurs when you run the battery down below its recommended discharge level. Over time, this can significantly reduce the battery’s lifespan. The level of discharge varies depending on the type of battery:

  • Acid and Gel batteries are safe to discharge up to about 80% of their capacity.
  • AGM batteries should not be discharged below 70% of their capacity.

For example, let’s say your equipment can run for four hours on a full charge. If it has been used for two hours, recharge the battery before continuing. Waiting until the battery is almost dead before charging it can cause sulfation—sulfur buildup that damages the battery cells and decreases their performance.

Tip: Regularly recharge your battery before it gets too low, even if you haven’t used it to its full capacity. This simple step will help avoid sulfation and prevent the battery from deteriorating prematurely.

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The Bottom Line: Care for Your Batteries

To keep your batteries strong, reliable and long-lasting, prevent overheating and deep discharge. By giving your batteries time to cool down, choosing the right size and charging them regularly, you’ll help your equipment stay in top condition, avoiding costly replacements and downtime. Proper battery maintenance is a small investment that pays off in better performance and a longer lifespan for your devices.

January 27, 2025