Light meaning and fix
APC Back-UPS Red Replace Battery Light: Meaning and Fix
On APC Back-UPS guidance, a solid red Replace Battery LED means the automatic diagnostic test determined the battery is near the end of its useful life.
On APC Back-UPS guidance, a solid red Replace Battery LED means the automatic diagnostic test determined the battery is near the end of its useful life.
What it means
The UPS battery may need replacement soon.
Device details
| Device type | UPS battery backup |
|---|---|
| Brand | APC |
| Model | Back-UPS LEDs |
| Light name | Red Replace Battery LED |
| Light location | UPS front panel |
| Color | Red |
| Pattern | Solid |
| Severity | warning |
| Last verified | 2026-05-02 |
What to do first
Let the UPS charge overnight, run a self-test, and replace the battery if the warning remains.
- Leave the UPS plugged in and turned on overnight with no load if possible.
- Run a manual self-test according to APC guidance.
- Check whether the Replace Battery LED remains lit.
- Verify the correct replacement battery for the exact UPS model.
- Replace the battery if needed.
- Recycle the old battery properly.
When this can be normal
This is a warning state, not a normal ready state.
When to stop troubleshooting
Stop before buying a battery until you confirm the exact UPS model and compatible replacement battery.
Parts or products that may help
Only replace parts when the light pattern and official guidance support it. Some lights indicate setup or software states, not broken hardware.
- Compatible APC replacement battery: The Replace Battery LED means the battery may be near the end of useful life.
FAQ
What does red Replace Battery mean?
Schneider Electric says the diagnostic test determined the battery is near the end of useful life.
Should I replace the battery immediately?
APC guidance says to charge overnight and perform a self-test before replacement.
Can I use any battery?
No. Use a replacement battery compatible with your exact UPS model.
This guide is based on: Schneider Electric APC Back-UPS LED FAQ.
Source type: official_support_page. Confidence: verified. Last verified: 2026-05-02.
Schneider Electric notes typical battery life depends on use and environment.