APC Smart-UPS 1400VA Replacement Batteries

About APC Smart-UPS 1400VA Replacement Batteries

Replacement batteries for the APC Smart-UPS 1400VA (SU1400 series)

When an APC Smart-UPS 1400VA stops holding charge or starts beeping for a battery fault, the unit itself is almost always fine — it is the internal battery pack that has worn out. The batteries in this collection are compatible replacement packs built to the original form factor, terminal layout, and electrical rating of the SU1400 family, so your UPS returns to full runtime without replacing the whole unit.

Battery type and how the pack scales

The Smart-UPS 1400VA runs on sealed lead-acid (VRLA/AGM) cells. The UPS operates on a 24-volt battery system, achieved by wiring two 12V batteries in series. Capacity (amp-hours) is what determines runtime, and the exact cell capacity can differ between SU1400 variants and between OEM production runs. Because of that, we do not publish a single blanket amp-hour figure for the whole series — the specifications shown on each individual product page are the ones that matter for your unit. The product grid below lists the rating for every model we carry.

Identify your battery by exact model number

The SU1400 family includes many close variants — SU1400R, SU1400RM2U, SU1400RMI, SU1400RMNET, SU1400RMX93, SU1400RMX106, SU1400RM2UX93, SU1400RMBX120, SU1400R2BX120, SU1400RMJ2U and more. They look similar but can use different pack sizes and tray configurations. Always match the exact model number printed on the back or bottom label of your UPS (it starts with "SU1400"). Select the product that lists your model under compatible models, and confirm the specs on that product page before ordering. The product grid on this page shows the specs for each one.

Genuine OEM vs. aftermarket

APC sells these as branded RBC (Replacement Battery Cartridge) packs. Aftermarket compatible packs use the same cell chemistry, voltage, and physical fit at a lower price. A quality aftermarket pack from a reputable supplier delivers equivalent runtime to the genuine RBC. The trade-off is the warranty and branding: genuine cartridges carry the manufacturer's name and warranty terms, while aftermarket packs are warranted by the seller. Both are valid choices — pick based on your budget and whether you need OEM branding for service contracts.

Battery lifespan

Expect roughly 3 to 5 years of service life from a Smart-UPS battery pack. Heat is the single biggest factor: as a rule of thumb, lead-acid battery life is cut roughly in half for every 8°C of sustained temperature above 25°C. A UPS installed in a hot server closet or near other heat-generating equipment will need replacement sooner than one in a climate-controlled room. Plan a proactive replacement before the pack fails, not after.

How to replace the battery

The SU1400 is a rack-mount / Smart-UPS line-interactive unit, which means it supports hot-swap battery replacement on most models — you can change the pack while the UPS continues to run on mains power and protect your load. General steps:

1. Confirm your exact model number and order the matching pack.
2. Open the front bezel or battery door to access the battery compartment.
3. Disconnect the old pack's connector, slide out the old battery tray.
4. Slide in the new pack and reconnect the connector firmly.
5. Reset the battery-replacement date in the UPS or PowerChute software so runtime calibration is accurate.

Hot-swap applies to rack-mount, Smart-UPS, and online (double-conversion) units only. Do not attempt a live hot-swap on desktop or Back-UPS consumer units — power those down before servicing. If you are unsure, shut down the connected equipment and power off the UPS before changing the battery.

Frequently asked questions

How do I know which battery fits my Smart-UPS 1400VA?
Read the model number on the label of your UPS (it begins with "SU1400") and pick the product on this page that lists that exact model. The specs on the product page confirm the fit.

Are aftermarket batteries safe to use?
Yes. Quality aftermarket packs match the OEM voltage, chemistry, and physical dimensions and are a common, cost-effective replacement. They are warranted by the seller rather than the manufacturer.

Can I replace the battery without shutting down my equipment?
On rack-mount and Smart-UPS models, yes — they are designed for hot-swap. Disconnect and reconnect the pack carefully. On Back-UPS or desktop units, power down first.

How long will the new battery last?
Typically 3 to 5 years. Keeping the UPS in a cool, ventilated location extends life significantly; heat shortens it.

What voltage is the battery system?
The Smart-UPS 1400VA runs a 24V system built from two 12V batteries in series. Confirm capacity on your specific product page.

APC and Smart-UPS are trademarks of Schneider Electric / American Power Conversion. UPSPLUSBATTERY.ca is not affiliated with, endorsed by, or authorized by the manufacturer; aftermarket batteries are compatible replacements.