Common Causes of Battery Failure

Failed UPS battery

Many big companies work overtime to make sure that their operations will continue unabated. A huge part of it is due to an uninterrupted power supply (UPS). It is a device that provides emergency power load when the main electricity source fails.

It is important to know when you should have replacement batteries for your APC UPS or when you should change the whole system. But the more important thing is to know how to take care of your battery and make them run longer. Battery Clerk presents some of the more common reasons for battery failure.


The ideal temperature for UPS batteries is somewhere between 22 to 25 degrees Celsius. Anything more than that can pose a significant threat to your battery life causing it to have a shorter lifespan.


Cycling is the process of discharge and recharge. UPS batteries can only undergo several cycles of recharge and discharge before replacement. This cycling happens when power interruptions cause the UPS to run on its battery backup and then charges itself when the main power is back on again.

Improper charging

Make sure your float voltage is within the recommended range. Undercharging or overcharging can cause your batteries to lose the capacity to charge at all.

Installation error

Improper installation is when most battery problems begin. Errors such as loose inter-cell connections, damaged post seals, and not replacing the shipping caps with vent caps can pose significant and permanent damage to your batteries.

Improper storage

Caring for your UPS starts when you purchase it and not when you start using it. Proper storage plays a huge role in the lifespan of your UPS batteries. Even though it is not used, batteries still discharge a small amount of energy. Charging it every three to for months of storage is recommended to prolong battery life.

It is important to remember that batteries are not designed to last a lifetime. When you think that it is time for a replacement, do so immediately.