UPS battery replacement and testing in Toronto
Runtime has dropped, the UPS shows a battery alarm, or the string is four years old: each is a reason to test it. We measure every block, replace single blocks or the full string with matched date codes, and take the old batteries away for recycling. The report shows why each block was kept or replaced.
Key facts
- VRLA life: three to five years for most APC blocks[1]
- APC Smart-UPS rule: replace the battery at least every 5 years[2]
- Replace at: 80% of rated capacity, or before (CSB)[3]
- Drift threshold: resistance more than 50% off baseline (EnerSys)[4]
- Heat: every 8 to 10 °C above 25 °C roughly halves VRLA life, depending on the maker [1] [5]
- Lithium-ion life: 10 to 15 years (Eaton)[6]
How Are UPS Batteries Replaced in a Live Data Centre?
In a planned visit, block by block: the old string is tested first, the swap runs online on hot-swap designs or from maintenance bypass on the others, and every new block is matched by model and date code. Ontario routes batteries of 5 kilograms or less to producer collection; large lead-acid blocks go to a recycler, with the disposal record handed over.
In this video
- 0:00 How are UPS batteries replaced in a live data centre?
- 0:14 When is a battery string due?
- 0:47 What happens on the day?
- 1:15 What happens to the old batteries?
- 1:41 Talk to Symetrix Canada
Transcript
How are UPS batteries replaced in a live data centre? In a planned visit, block by block. The old string is tested first, your load stays protected the whole time, and every new block is matched, torqued and recorded. Here is how it runs.
When is a battery string due? Sealed lead-acid blocks last about 3 to 5 years, and APC says to replace them at least every 5 years regardless. On test, a block that has slipped to 80 percent of its rated capacity is due for replacement; one that has drifted more than 50 percent from its resistance baseline needs further evaluation. A 180 day early warning from the UPS means the end is near. And a swollen or hot block stops everything: that is a safety call, not a maintenance item.
What happens on the day? The technician identifies the model, the block count and the terminals from your UPS. Eaton's rule applies: the same number of sealed lead-acid blocks. Hot-swap designs are changed online, with the UPS carrying the load. Everything else goes to maintenance bypass first, agreed with you in advance. The new blocks carry one model and one date code, every connection is torqued and checked, and the float voltage is confirmed before the load comes back.
What happens to the old batteries? The report records a baseline for every new block, so the next visit has something to compare against. And the old blocks leave with us for recycling: Ontario's battery rules route batteries of 5 kg or less through the producer's collection network, and the big lead-acid blocks go to a recycler, with the disposal record handed to you. Remember, a battery warranty covers defects, not age.
Planning a battery replacement in Toronto? Symetrix Canada does the work and hands you the report. Reply and quote within 4 business hours. Call 1 (438) 800-0382. Find Symetrix Canada on the web.
End-of-life signals
| Signal | What it means |
|---|---|
| APC Near End of Life alarm | By default it sounds 180 days before the estimated end of life [7] |
| Replace Battery alarm | Replace the battery immediately [2] |
| Internal resistance up | More than 50% above baseline calls for further evaluation [4] |
| Capacity test result | Below 80% of rating, replace the string [3] |
| Short runtime | Well under the runtime chart at your measured load |
| Swelling, leaks, hot terminals | Stop and call: a safety problem, not a maintenance item [8] |
APC adds a practical rule: near the end of service life, consider replacing even if the Replace Battery message has not appeared [9].
What shortens battery life
Heat, poor utility power and frequent short discharges all shorten it [10]. Heat is the one you can control. APC puts the halving point at an 8 °C rise [1] and Tripp Lite at 10 °C above 25 °C [5]; Eaton sets 20 to 25 °C as the range for full battery life [11]. A battery cabinet in a warm plant room uses up its life years early.
How we replace a string
- Identify the battery model, block count, voltage, capacity and terminals from the blocks and the UPS model. Eaton’s rule: the same number of sealed lead-acid batteries [12].
- Test the old string, so the report records why it was replaced.
- Plan the swap. Hot-swap models are changed online. Others go to maintenance bypass, agreed with you in advance.
- Fit blocks of one model and one date code. A new block in an old string ages early.
- Torque and check every connection, then confirm float voltage and charger settings.
- Record a baseline for each new block, for the next visit to compare against.
- Recycle the old batteries and give you the disposal record.
Warranty and normal aging
A battery warranty covers defects, not age. Eaton’s, for example, excludes the normal aging and loss of ampere-hour capacity [13]. The block readings are what tell you a string is due, before an outage does.
Common questions
How long should a UPS battery last?
Most APC VRLA batteries last three to five years [1], less in a warm room. Eaton gives lithium-ion UPS batteries 10 to 15 years [6].
How do I tell if a UPS battery is bad?
A failed self-test or battery alarm, runtime far below the chart, a block's internal resistance well above its baseline [4], or a block that is swollen, leaking or hot.
Can one battery be replaced, or must it be the whole string?
One failed block in a young string can be replaced with a matched block. In an older string, a single new block moves the failure to the next weakest one, so the full string is the better spend.
How much does UPS battery replacement cost?
It depends on the battery model, the block count, and whether the work needs bypass or after-hours scheduling. Send the UPS model and a photo of a battery label for a price.
How do I dispose of old UPS batteries in Ontario?
Through a lead-acid battery recycler, never household waste. Ontario's Batteries Regulation covers batteries of five kilograms or less [14]; large UPS blocks go to a lead-acid recycler. When we replace a string, we take the old batteries. The battery recycling guide covers small cartridges and lithium-ion modules.
Sources
- Schneider Electric, What is the expected life of my APC UPS VRLA battery? (FA158934), FAQ answer
- Schneider Electric, Smart-UPS On-Line SRT2200XLA/SRT3000XLA Operation Manual, p. 5, battery notice
- CSB Energy Technology, VRLA Battery User Manual (Operation and Handling, Rev Dec 2024), failure modes table
- EnerSys, PowerSafe SBS XL Installation, Operation and Maintenance Manual, maintenance section
- Eaton (Tripp Lite), Tripp Lite by Eaton SmartOnline SU750-SU3000RTXLCD2U Owner's Manual 614-21325 Rev 05, section 5.1, Equipment Care (PDF p. 37)
- Eaton, Lithium-ion UPS FAQ, FAQ
- Schneider Electric, Smart-UPS On-Line SRT2200XLA/SRT3000XLA Operation Manual, p. 15, configuration
- CSB Energy Technology, VRLA Battery User Manual (Operation and Handling, Rev Dec 2024), troubleshooting table, p. 11
- Schneider Electric, Smart-UPS On-Line SRT2200XLA/SRT3000XLA Operation Manual, troubleshooting
- Schneider Electric, Smart-UPS On-Line SRT2200XLA/SRT3000XLA Operation Manual, p. 2
- Eaton, Eaton 91PS/93PS UPS 8-40 kW User's and Installation Guide, P-164000493 rev 006, p. 16
- Eaton, Eaton 91PS/93PS UPS 8-40 kW User's and Installation Guide, P-164000493 rev 006, p. 109
- Eaton, Eaton 91PS/93PS UPS 8-40 kW User's and Installation Guide, P-164000493 rev 006, p. 118, warranty
- Government of Ontario, O. Reg. 30/20: Batteries, s. 1 definition of battery
Updated