UPS Battery FAQ’s

UPS Battery Replacement Questions

Power Management Solutions are the experts in power and the leading power protection resource. We supply and install UPS battery replacements providing optimized uptime, power, life expectancy and costs. Maximizing your power protection provides an increase in your business efficiency. Trust Power Management Solutions to keep your business productivity performing at its highest. PMS Power provides ongoing technical support regarding all your battery needs. Below are frequently asked questions about UPS batteries. Continuing to generate our exceptional service, we utilize our wealth of experience and knowledge to provide helpful answers to the most common questions. Check back often as we will continue to provide you with our powerful knowledge!

Contact the UPS battery replacement specialists at Power Management Solutions, Inc for more information today!

Are maintenance-free batteries maintenance-free?

Though sealed batteries are sometimes referred to as maintenance free, they still require scheduled maintenance and service. The term maintenance-free refers to the fact that they do not require fluid. Preventive maintenance is the key to maximizing your UPS battery service life.

Do I have to replace my UPS batteries with the same brand of batteries?

If you use brand X and need to replace one or two batteries in the string you should use the same brand because they will have the same characteristics. If you need to replace the whole string then you can change brands with fewer risks.

How can I ensure that my UPS batteries are maintained and serviced properly?

With proper maintenance, battery life can be predicted and replacements scheduled without interrupting your operations. These are IEEE and OEM recommendations for general maintenance:
Comprehensive maintenance programs with a monthly inspection and more rigorous quarterly and annual checks
Re-torque all connections, as required
Load testing
Cleaning the battery area, as required

How is battery runtime affected if I reduce the load on the UPS?

The battery runtime will increase if the load is reduced. As a general rule, if you reduce the load by half, you triple the runtime.

If I add more batteries to a UPS can I add more load?

Adding more batteries to a UPS can increase the battery runtime to support the load. However, adding more batteries to the UPS does not increase the UPS capacity. Be sure your UPS is adequately sized for your load, and then add batteries to fit your runtime needs.

If I have the serial number from the UPS or battery cabinet, can I find out how old the batteries are?

Every battery has a manufacturer date code that indicates when the battery was made. The battery or battery cabinet will also feature a sticker for each time the batteries have been recharged while in storage. Stored batteries require charging every six to 10 months, up to 18-30 months. Recharging stored batteries does not affect battery warranty.

Is it safe to transport sealed batteries?

Because they don’t contain liquid material there are no restrictions on shipping sealed batteries.

My UPS has been in storage for over a year. Are the batteries still good?

As batteries sit unused, with no charging regimen, their battery life will decrease. Due to the self-discharge characteristics of lead-acid batteries, it is imperative that they be charged after every six to 10 months of storage. Otherwise, permanent loss of capacity will occur between 18 and 30 months. To prolong shelf life without charging, store batteries at 10°C (50°F) or less.

Our facility was damaged by a flood and our batteries were partially submerged in water. What should I do?

The first concern in this situation is safety. Containing any contamination is critical to preventing hazards to workers and the environment.
The second concern would be to have the batteries load tested, have any or all replaced that do not meet the “useful life” criteria.

What about the disposal of batteries?

It is imperative that your service technicians adhere to EPA guidelines for the disposal of all UPS batteries. Remember, it is the owner’s responsibility (and liability) to make sure these guidelines are followed.

What is the "end of useful life" for a UPS battery?

The IEEE defines “end of useful life” for a UPS battery as being the point when it can no longer supply 80 percent of its rated capacity in ampere-hours. When your battery reaches 80 percent of its rated capacity, the aging process accelerates and the battery should be replaced.

What is the average lifespan of UPS batteries?

The standard lifespan for VRLA batteries is three to five years, and for wet-cell batteries is up to 20 years. However, expected life can vary greatly due to environmental conditions, number of discharge cycles, and adequate maintenance. Have a regular schedule of battery maintenance and monitoring to ensure you know when your batteries are reaching their end-of-life.

What the difference between hot-swappable and user-replaceable batteries?

Hot-swappable batteries allow the batteries to be changed out while the UPS is running. User-replaceable batteries are usually found in smaller UPSs and require no special tools or training to replace. Batteries can be both hot-swappable and user-replaceable. Please check your user manual for details on your UPS batteries.

Why are batteries disconnected on small, single-phase UPSs when they are shipped?

This is so that they are in compliance with Department of Transportation regulations.