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Rectangular sealed lead-acid battery, dark plastic case, two screw terminals on top

BatteryJack inc.

BatteryJack inc. 12V 55AH 660W UPS Replacement Battery

SKU CH-S29K-8MQPY

Sealed lead-acid AGM battery delivers 12 V, 55 Ah and 660 W for UPS, wheelchair and mobility use

  • 12 V 55 Ah capacity powers UPS systems longer
  • Advanced AGM technology delivers maintenance-free operation
  • 660 W rating supports demanding backup loads
  • Direct replacement for 22NF and 55 Ah models
  • Compact 9.0 × 5.4 × 8.1 in size fits standard enclosures

12V 55AH UPS replacement battery

This sealed lead-acid battery uses advanced AGM technology to deliver 660W of backup power for UPS units, wheelchairs and mobility devices. It arrives ready to install with terminal screws included and requires no ongoing maintenance.

Sustained discharge performance

The AGM construction provides consistent voltage output during extended outages rather than only brief bursts, and the chemistry is rated for an expected service life of four to seven years under normal float conditions.

Direct OEM replacement upgrade

It replaces a long list of legacy part numbers including 22NF, 3312 and 5512 models, and where an existing pack is rated at 50AH this 55AH unit will simply run longer. Buyers needing a different voltage, a higher wattage rating or a lithium chemistry should look elsewhere.

Highlights

  • 12 V 55 Ah capacity powers UPS systems longer
  • Advanced AGM technology delivers maintenance-free operation
  • 660 W rating supports demanding backup loads
  • Direct replacement for 22NF and 55 Ah models
  • Compact 9.0 × 5.4 × 8.1 in size fits standard enclosures

Specifications

No published specifications for this item yet.

Questions about this item

Does the 12V 55AH 660W SLA battery generate noticeable heat or noise during continuous UPS operation?

Sealed lead-acid AGM batteries operate silently and produce minimal heat under normal float charging; no fan or moving parts are present.

What terminal hardware is needed to install this 22NF-sized battery in my existing UPS?

The battery includes screws for the terminals; ensure your UPS uses compatible F2 or flag terminals matching the 22NF form factor.

Can this 55AH replacement work alongside my older 50AH or 33AH batteries in the same string?

Mixing capacities is not recommended; the 55AH unit will charge and discharge differently than 50AH or 33AH cells, reducing overall string life.

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