Eaton Replacement Batteries

About Eaton Replacement Batteries

What is an Eaton UPS replacement battery?

Every Eaton UPS uses sealed lead-acid (SLA) cartridges in a defined Eaton part number — the 744-A series (e.g. 744-A3121, 744-A2992, 744-A4143) for internal cartridges and the 9PXEBM / 9SXEBM / 5PXEBM series for External Battery Modules that snap onto the UPS for runtime extension. The cartridge or EBM number is on the unit label and listed in the user manual.

UPSPLUSBATTERY.CA stocks the full Eaton replacement-battery line — both genuine Eaton and compatible aftermarket equivalents on the SLA cartridge tier. Lithium-ion batteries on 9PX G2 lithium variants are factory Eaton only. Full Eaton UPS catalog at Eaton UPS; broader cross-brand replacement-battery catalog at all UPS replacement batteries.

Eaton UPS to battery cross-reference

If the label is unreadable, send the model number to our team — replies within 1 business day.

How to identify the right battery

Method 1: front-panel LCD

On 5P, 5PX, 9SX, 9PX with LCD: Service → Battery Information.

Method 2: unit label

Side or back of chassis lists model number and Eaton battery part.

Method 3: existing cartridge

Open the front bezel — cartridge label lists cell count, voltage, and Ah.

Genuine Eaton vs compatible aftermarket

Genuine Eaton: OEM cartridge with factory tested-date sticker, full Eaton battery warranty, guaranteed compatibility with IPM and Network-M2 runtime estimation. Required for in-warranty Eaton UPS.

Compatible aftermarket: Identical form factor, connector, voltage stack — built from CSB, Yuasa, BB Battery, Panasonic SLA cells. Typically 30–50 % less than genuine. 1-year UPSPLUSBATTERY warranty.

Lithium-ion packs for 9PX G2 are factory Eaton only.

How long do Eaton batteries last?

SLA: 4–5 years rated by Eaton in 20–25 °C climate-controlled environment. Lithium-ion on 9PX G2: ~10 years rated. IPM and front-panel LCD flag the battery once internal impedance crosses the threshold. When to replace UPS battery.

How to replace

Most Eaton 5P / 5PX / 9SX / 9PX cartridges are hot-swappable. Procedure:

1. Order the correct 744-A or EBM (verify against the unit label or LCD).
2. Slide the front bezel off.
3. Disconnect the polarised battery plug.
4. Slide old cartridge out, new one in.
5. Reconnect the plug until it clicks.
6. Replace bezel and reset install date.

How to install UPS battery.

External Battery Modules (extended runtime)

9PX, 9SX, 5P, and 5PX support EBMs via rear bus connector. Each EBM roughly doubles available runtime; multiple EBMs stack on most models. Hot-pluggable on 9PX. Common EBMs: 9PXEBM48RT (48 V), 9PXEBM240RT (192/240 V), 9SXEBM48T, 5PXEBM48RT, 5PXEBM72RT.

Warranty and support

Genuine Eaton: factory battery warranty (typically 2 years). Compatible aftermarket: 1-year UPSPLUSBATTERY full-replacement warranty. Coordinated through our Canadian team. Shipped from our Canadian warehouse. Replies within 1 business day.

FAQ

What does 744-A mean?

Eaton's part-numbering prefix for SLA replacement cartridges.

How do I confirm the cartridge for my 5P1500R?

5P1500R takes 744-A3121 (also fits 5PX1500RT, 9SX1500, 9PX1500RT — all share the same 48 V cartridge).

Aftermarket vs genuine?

For in-warranty: genuine. Out-of-warranty: aftermarket performs identically and costs 30–50 % less.

Hot-swap?

Yes on every current 5P, 5PX, 9SX, 9PX.

Add an EBM?

Yes on 9PX and most current 9SX, 5PX, 5P.

Lithium-ion for 9PX?

Yes on 9PX G2 lithium variants — factory Eaton only.

Disposal?

SLA: municipal hazardous-waste depot, Call2Recycle, or ship back to us with new cartridge.