Why Uninterruptible Power Supplies Stop Charging

April 3, 2020 11:52 pm Published by Leave your thoughts

Uninterruptible power supplies, also referred to as UPS batteries, don’t last forever. With proper uninterruptible power supply maintenance in Houston, TX, you can help extend the life of the battery. However, it still possesses a limited lifespan.

Why is this the case? Read on to discover why this type of power supply eventually stops charging, and how you can maximize its use. For more information, reach out to your local battery supplier.


Each occurrence of running down and recharging is called a cycle. Every time your battery uses its power and must be recharged, it goes through one cycle. UPS batteries have a limited number of these cycles. Eventually, they cannot repower.

Hardened lead

Why can’t the battery continue to cycle? After a certain number of cycles, which varies by type and brand, the lead that is located inside the battery hardens. When it does, the battery can no longer charge.


Another reason batteries no longer charge is a process called sulfation. This happens when lead sulfate crystals build up in the battery. It typically occurs when the battery does not fully charge during a cycle. The crystals form on battery plates and eventually interfere with the electrical process. It damages the battery so it can no longer cycle up to a full charge.


To extend the life of your UPS batteries, practice appropriate uninterruptible power supply maintenance in Houston, TX. Try these tips:

  • Cooling: Make sure your UPS battery has sufficient airflow or venting to cool properly. An overheated battery does not last as long as one that remains at a stable, cool temperature. Additionally, if you will be storing a UPS battery, make sure the storage area isn’t too warm. High temperatures are tough on batteries.
  • Cleaning: Keep points of contact on the battery clean. Clear away any grime, buildup or other debris regularly. This will help prevent corrosion and interference by dust and other materials.
  • Charging: If you won’t be using your UPS battery for an extended period of time, make sure it maintains its charge. Recharge it at least every six months to prevent loss of capacity. If the storage area is warm or humid, charge it more frequently.


Take a proactive approach to your UPS battery use. Note the manufacturer’s expected lifespan for the product when you purchase it. Two years is a typical lifespan for many UPS batteries, even with good uninterruptible power supply maintenance in Houston, TX. Make a plan to replace the battery before the time period is up, so you are not surprised by a sudden power failure. If you’re not sure how long your battery should last, consult with the manufacturer or contact a local battery dealer.

Get more answers

If you have additional questions about uninterruptible power supply maintenance in Houston, TX or related issues, there’s no better source for answers than Texford Battery Co. We are much more than just another battery specialist. With 80-plus years in the industry, we offer unmatched services and over 10,000 leading products. Reach out to our knowledgeable staff today for expert input.

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