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Things you should konw about the lifespan of UPS batteries

When choosing a UPS, you should consider the lifespan of your UPS batteries. Because it is usually shorter than your UPS and you should replace the battery on time to avoid UPS failure. Here are things you should konw about the UPS battery life.

Kstar BATTERY  life time

Average UPS battery life 

UPS batteries (traditional sealed lead-acid batteries) tend to have either a 5-years or 10-years design life. Some may last for 10-15 years. Yet performance will significantly reduce overtime to a degree where it is not safe to use in a UPS system. So you should figure out its service life instead of design life.

Difference Between UPS Battery 'Design Life' And ' Service Life

Design life is how long a UPS battery will last for assuming perfect operating conditions, while service life is the length of time before the battery needs replacing. 


That is, if your ups battery has 10-years of design life, we recommend you replace the battery at 7-8 years. 

How to prolong your battery lifespan

Before learning how to prolong your battery life you should keep the key factors determining battery lifetime in mind. That is: 


·Average Depth of Discharge (DoD) 

·Frequency of discharge (cycles) 

·Average temperature 

·Typical discharge and charge routine 

·Storage state and conditions 

4 methods to prolong your UPS battery lifespan.


1. Avoid draining your UPS battery all the way to 0%  

Fully discharged batteries must be recharged within 48 hours to prevent damage. Be mindful of your batteries’ discharge status because over-discharging and excessive charging – like in the case of weekly battery cycling – can cause charging problems and shorter battery life.

2. Maintain UPS batteries'  float voltage through regular maintenance

Another essential measure in battery maintenance is ensuring that they are charging as they should. Manufacturers list the float voltage of a battery and data center operators should ensure that this float voltage is adjusted as measured at the input of the battery string of the UPS. This ensures that there is enough voltage to charge the batteries with a value that is in the manufacturer’s specified range. 

3. Operate at a proper temperature

The temperature recommendation from a manufacturer, usually based on an ambient temperature of 25°C (77°F), should strictly be followed. It is believed that increasing the upper limit temperature halves the lifespan of a battery every 10 degrees.

4 . Charge your stored batteries

If you have replacement batteries, remember to charge them every six months or they will suffer a permanent loss of capacity within 18 to 30 months.

These measures are performed to ensure that the downtime of a data center is not greatly compromised, as well as protect stored data.

For more information on how to replace your UPS battery, visit https://www.kstar.com/indexproblem/17887.jhtml.