Vertiv Liebert PSA Battery Replacements

Replacement batteries for Vertiv Liebert PowerSure PSA UPS units

The Vertiv Liebert PowerSure PSA series is a line of line-interactive uninterruptible power supplies. Like every UPS, the PSA depends on internal sealed lead-acid (SLA / VRLA) batteries that wear out and need periodic replacement. The batteries in this collection are compatible replacements matched to specific PSA models so your UPS keeps delivering runtime during outages.

Battery type and how capacity varies

PowerSure PSA units use maintenance-free, sealed lead-acid batteries rated at 12 volts each. Capacity is expressed in amp-hours (Ah), and both the Ah rating and the number of batteries differ from model to model rather than following a simple size pattern. Across the models in this collection the per-battery rating ranges from 12V 7.2Ah to 12V 9Ah to 12V 12Ah, and some 1000VA models use two 12V batteries per unit while others use one. Because the exact Ah and battery count are model-specific, never assume one size fits the whole series. Match the battery to your exact UPS model using the product grid below, where each listing states the verified voltage, amp-hours, and battery configuration for that model.

Identify your battery by exact model

The reliable way to order the correct battery is to read the model number printed on the UPS label (for example PSA500MT-230, PSA650MT-230, PSAXT700-230, PSA-700, PSA1000MT-230, or PSA1000MT3-120U) and match it to the corresponding product in the grid below. Each product lists its voltage, amp-hours, and the UPS model it fits. Match by exact model first; the product specifications confirm the fit.

OEM vs. aftermarket batteries

You can replace PSA batteries with Vertiv OEM battery kits or with compatible SLA batteries of the same voltage, capacity, and terminal type. The batteries in this collection are compatible replacements matched on voltage, capacity, terminals and connectors.

Expected lifespan

Sealed lead-acid UPS batteries generally last 3 to 5 years under normal conditions. Heat is the single biggest factor in shortening that life: as a rule of thumb, battery life is roughly halved for every 8°C of sustained temperature above 25°C. Keep the UPS in a cool, ventilated location and test runtime periodically.

How to replace the battery

1. Confirm the correct replacement by matching your exact UPS model number to the product in the grid.
2. Order the matching battery and inspect it on arrival (SLA batteries ship charged and sealed).
3. Shut down connected equipment, power off and unplug the PSA UPS, then open the battery compartment and swap the battery. The PowerSure PSA is a line-interactive tower/desktop UPS and is not designed for hot-swapping, so always power it down first.
4. Observe polarity and reconnect the terminals exactly as the originals were wired. On models that use two batteries, reconnect both in the original configuration.
5. Recharge the UPS fully (often several hours) before relying on it for backup runtime.
6. Recycle the old SLA battery at an approved facility.

A note on hot-swapping: the PowerSure PSA series is not a hot-swappable design. Always shut down and unplug the unit before replacing its battery. Hot-swapping (changing the battery while the UPS keeps powering the load) applies only to UPS families specifically engineered for it, which the PSA is not.

Frequently asked questions

How do I know which battery my PSA UPS needs? Read the model number on the UPS label and match it to the product in the grid below. Each listing shows the voltage, amp-hours, and the model it fits.

Are these batteries 12V? Yes. PowerSure PSA units use 12V sealed lead-acid batteries; the amp-hour rating and number of batteries vary by model, so confirm the exact specs on the product page.

Can I use an aftermarket battery instead of the Vertiv OEM kit? Yes, provided it matches the original voltage, amp-hour capacity, and terminal type. The batteries in this collection are compatible replacements matched on voltage, capacity, terminals and connectors.

How long will a new battery last? Typically 3 to 5 years. Sustained heat shortens that significantly, roughly halving life for every 8°C above 25°C.

Do the batteries arrive ready to use? Yes. They ship fully sealed and charged. Recharge the UPS fully after installation before depending on backup runtime.

Disclaimer: Model names and trademarks belong to their respective owners. UPSPLUSBATTERY.ca is not affiliated with, endorsed by, or authorized by the manufacturer; aftermarket batteries are compatible replacements.