A UPS (Uninterruptible Power Supply) is exactly what its name suggests—it provides backup power when the main supply fails. But here’s the catch: without a battery that works, a UPS is just a fancy-looking box.
The UPS system’s battery is what truly delivers uninterrupted power when you need it most. That’s why proper UPS battery maintenance is essential—not only to ensure reliability but also to avoid the risks associated with battery failure. And when a battery reaches the end of its life, safe and responsible disposal is just as important.
In this article, we’ll explore UPS battery maintenance, the risks of neglect, and the most responsible way to dispose of them when they’re spent.
UPS Battery Maintenance and Testing
A UPS battery is a consumable item with a limited lifespan. This often catches people by surprise – they think the battery will last as long as the UPS.
Typically, battery life ranges between 3 to 10 years, depending on its design, the number of charge-discharge cycles, how it is cared for, and environmental factors.
It’s important to note that a battery can degrade prematurely without proper care and regular maintenance, reducing power capacity and increasing potential system failures. For more information, read our blog: Everything you need to know about UPS batteries in South Africa: The Ultimate Guide to UPS Batteries.
Below, you will find some battery maintenance practices:
1. Regular Inspections
Perform routine checks on your batteries and look for physical damage, swelling, corrosion, or leaks to detect early signs of battery failure. This allows you to replace them before the problem gets critical.
2. Voltage and Capacity Testing
Standby Systems conducts onsite battery tests to compare the actual battery performance against the manufacturer’s specifications. This helps identify underperforming batteries before they cause downtime.
3. Battery Discharge Testing
This is a controlled test using the UPS unit to determine how much charge the battery can still hold and whether it can support the critical load during a power outage. Impedance measurements are optional but recommended; impedance testing measures the battery’s internal resistance. Higher resistance indicates ageing and reduced efficiency, allowing proactive battery replacements before complete failure.
Battery Replacement Guidelines
To prevent failures, it is advisable to replace UPS batteries before they reach their end-of-life threshold:
3 to 5-year design life – Replace every 3 years under preventive maintenance.
10-year design life – Replace every 7 years to ensure reliable performance.
Standby Systems uses high-quality, trusted battery brands like ELITE to ensure longevity and stable performance.
Risks of Using the Wrong Battery Type
Choosing the right battery for your UPS unit should be at the top of your priority list, mainly for safety reasons, performance, and legal compliance. Many businesses make the mistake of using general-purpose MF (Maintenance-Free) or deep-cycle semi-sealed batteries, which are not designed for UPS applications.
Why MF/Deep Cycle Batteries Are Unsuitable for UPS Units
1. Increased Fire and Explosion Risk
These batteries release hydrogen gas (H₂), which is explosive in enclosed spaces such as battery cabinets or server rooms. The cost of repairing the damages from a possible explosion will be much more than getting a suitable battery from the get-go.
2. Acid Leakage Hazard
Unlike VRLA AGM (Valve Regulated Lead Acid, Absorbent Glass Mat) batteries, MF and semi-sealed batteries contain free-flowing sulfuric acid (H₂SO₄) that can leak if the battery is tilted or damaged, posing an environmental and health hazard.
3. Environmental Concerns
Lead-acid batteries are recyclable, but MF technology cells contain liquid acid, which, if spilt, can contaminate surfaces and water supplies and cause severe chemical burns.
4. Shorter Lifespan and Poor Performance
These batteries are designed for automotive applications, not standby power. Using them in a UPS unit results in frequent failures and higher replacement costs.
5. Legal and Insurance Risks
No Insurance Coverage
If a business uses an MF/semi-sealed battery in a UPS unit and a fire occurs, insurance companies will NOT cover damages, even if the entire building burns down.
Liability for Injury or Death
In South Africa, using the wrong battery in a UPS unit makes the user fully liable for any injuries or fatalities caused by battery failure, with no public liability insurance protection.
So, what you can do to ensure your batteries will last and your business will stay safe is to always use VRLA AGM batteries, as they are specifically designed for single- and three-phase UPS and standby units, reducing risks and ensuring compliance with safety standards.
Proper Disposal and Environmental Responsibility
The disposal of UPS batteries is an often overlooked aspect of battery management that affects environmental sustainability, legal compliance, and workplace safety. Given that UPS batteries contain hazardous materials like lead, sulfuric acid, and other toxic chemicals, improper disposal can cause severe environmental damage, health risks, and financial penalties.
The Importance of Proper UPS Battery Disposal
Preventing Environmental Contamination
UPS batteries contain lead (Pb), sulfuric acid (H₂SO₄), and other harmful chemicals, which can leach into soil and water sources if not disposed of correctly. This contamination poses serious risks.
Water Pollution
If sulfuric acid leaks into groundwater, it can make drinking water unsafe and harm aquatic and other life in the area.
Soil Degradation
Lead and other heavy metals can remain in the soil for decades, making the land unsuitable for agriculture or habitation.
Air Pollution
Incinerating lead-acid batteries releases toxic fumes, which can cause respiratory illnesses and contribute to acid rain.
All used UPS batteries should be collected and transported to certified recycling facilities that handle hazardous materials safely.
Compliance with Environmental Laws and Regulations
Improper disposal of UPS batteries can lead to legal consequences. In South Africa, businesses must comply with the following:
- ISO 14001 Environmental Management Standards, which ensures proper dangerous waste handling and sustainability practices.
- The National Environmental Management Waste Act (NEM: WA) regulates the disposal of hazardous waste, including lead-acid batteries.
- Road Transport Regulations aim to govern the safe transport of unsafe goods, ensuring no spills or leaks occur during transit.
Failure to comply with these laws can result in the following challenges:
Fines and Legal Penalties
Businesses can face heavy fines or even legal action for improper battery disposal.
Reputational Damage
Companies that fail to dispose of hazardous batteries responsibly risk damaging their public image due to the fallout from the battery waste.
Health and Safety Violations
Workers who handle old batteries improperly may be exposed to toxic chemicals, leading to workplace injuries and potential liability claims.
Businesses should always work with certified battery disposal and recycling partners, which ensures full compliance with environmental laws.
Safe Collection, Transport, and Recycling of Used Batteries
Collection and Inspection
Used UPS batteries are collected from the customer’s site and checked for leaks or damage before transportation.
Secure Transportation
Batteries are then transported to the recycling plant according to road safety regulations, preventing spills and ensuring compliance with hazardous goods transport laws.
At the Recycling Plant
Recycling plants extract the lead and reuse it in new battery production, plastic casings are recycled into new battery enclosures, and sulfuric acid is neutralised and converted into safe byproducts like sodium sulphate for detergent production.
Conclusion
There’s a lot of information out there on UPS batteries. Sometimes, it can be daunting to try and sift through it all. To help you, we posted a UPS Battery FAQ.
However, here are THREE key steps regarding UPS batteries that are easy to remember and will never let you down:
Step one – ensure you have the right good quality battery for your UPS application.
Step two – look after the battery by keeping it in the right conditions and regularly maintaining it.
Step three – Replace and dispose of it responsibly at the end of its service life.
If you need UPS or battery assistance, contact Standby Systems.
Whether you are in Johannesburg, Bloemfontein, Maputo, Gaborone, Windhoek, or anywhere in between, our experienced technical team is ready to advise you on the best single- or three-phase UPS and battery solutions for your business or industry’s specific needs.
Visit Standby Systems’ website or contact us at 011 794 3406 for services, 011 794 2541 for UPS systems for sale, or our UPS contact number at 082 450 2361.