Eaton Powerware PW5119 Replacement Batteries

About Eaton Powerware PW5119 Replacement Batteries

Replacement batteries for the Eaton Powerware PW5119 UPS series

The Eaton Powerware PW5119 is a line-interactive UPS family built for servers, networking gear, and small server rooms. Like every UPS in this class, it stores energy in sealed lead-acid (SLA / VRLA) batteries that wear out and need periodic replacement to keep your runtime ratings intact. The kits in this collection are direct-fit replacements for the internal battery packs across the PW5119 range.

Battery type and how the pack scales

PW5119 units use sealed lead-acid cells, but the pack configuration is not the same across the line. Smaller models use a few 12V cells; larger and rack models string together multiple 6V or 12V blocks to reach the required DC bus voltage. Amp-hour capacity also changes with the model. Because of this, there is no single voltage/Ah spec for the whole series — the correct kit is determined by your exact model.

Identify your unit by exact model

Find the model number on the front bezel or the rating label on the rear of the chassis (for example PW5119-1000i, PW5119-1500i, PW5119-2400i, or a rack -RM variant). Match that exact model to the product below. Each product page lists the voltage and amp-hours for that kit, and the grid on this page shows the specs per product so you can confirm the fit before you order.

Genuine OEM vs. aftermarket

You can replace PW5119 batteries with genuine Eaton OEM packs or with compatible aftermarket SLA kits. Aftermarket kits use cells of the same chemistry, voltage, capacity, and terminal type as the original, and are a lower-cost, drop-in alternative. The kits sold here are aftermarket compatible replacements, not Eaton-branded parts.

Battery lifespan

SLA UPS batteries typically last 3 to 5 years. Heat is the biggest factor: every roughly 8°C (about 15°F) of sustained temperature above 25°C (77°F) can cut battery life by about half. Keep the unit in a cool, ventilated spot and check the UPS self-test status periodically. If runtime has dropped noticeably or the UPS reports a battery fault, it is time to replace.

Replacement steps

1. Confirm the exact PW5119 model and order the matching kit.
2. Save your work, shut down connected equipment, switch off and unplug the UPS, then open the battery compartment. The PW5119 is a line-interactive design; unless your specific model's manual documents a user-replaceable, hot-swappable battery module, power the unit down before servicing rather than attempting a hot-swap.
3. Disconnect the old pack, noting cable orientation. Remove all old batteries together — never mix old and new cells.
4. Install the new kit, reconnect in the same orientation, close the compartment, power on, and run a self-test. Recharge fully (typically several hours) before relying on backup runtime.

FAQ

How do I know which kit fits my PW5119?
Match the exact model number printed on your unit to the matching product in the grid. Each product lists its voltage and amp-hours.

Can I replace the batteries myself?
Yes for most users. Power the unit down first and follow the steps above. If your specific model's manual documents a user-replaceable battery module, follow that procedure instead.

Are these the same as Eaton OEM batteries?
They are compatible aftermarket replacements that match the original cells in voltage, capacity, chemistry, and terminal type.

How long will the new batteries last?
Typically 3 to 5 years, shorter in hot environments. Heat above 25°C roughly halves life for every ~8°C increase.

Do I need to replace all the batteries at once?
Yes. Always replace the whole pack together; mixing old and new cells shortens the life of the new ones.

Eaton, Powerware, and PW5119 are trademarks of Eaton Corporation. UPSPLUSBATTERY.ca is not affiliated with, endorsed by, or authorized by the manufacturer; aftermarket batteries are compatible replacements.