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Rectangular sealed lead-acid battery, dark plastic case, two top terminals with screws

BatteryJack inc.

BatteryJack inc. PS-12550 12V 55AH SLA ups replacement battery

SKU CH-4R7M-51TH1

12 V 55 Ah sealed lead-acid AGM battery replaces UPS12-170 and UB12550 in UPS, wheelchair and mobility applications

  • Lasts 4-7 years with advanced AGM technology
  • Ready to install with included terminal screws
  • Fits existing UPS tray at 9.0 x 5.4 x 8.1 inches
  • Direct OEM replacement for UPS12-170 and UB12550
  • Zero upkeep required with maintenance-free sealed design

PowerStar 12V 55AH UPS Battery

The PowerStar PS-12550 is a 12V 55AH sealed lead-acid battery built with advanced AGM technology for UPS backup and mobility equipment. It arrives new, maintenance-free, and includes terminal screws for direct installation. The 22NF form factor fits standard battery compartments in UPS units, wheelchairs, and similar devices. A three-year warranty covers UPS and backup applications.

Capacity and Runtime Headroom

Rated at 55AH, this battery provides more stored energy than common 50AH alternatives, extending runtime during outages or mobile use. AGM construction delivers consistent voltage under load and resists vibration in wheelchair or scooter service. The sealed design eliminates watering and allows operation in any orientation. Service life is rated at four to seven years depending on depth of discharge and temperature.

Upgrade Path and Fit

This unit replaces the UPS12-170, UB12550, and a long list of OEM part numbers across brands such as APC, CyberPower, Eaton, and Tripp Lite. It also cross-references wheelchair and mobility packs including 22NF, 22NF-HCBCI, and Group 22NF sizes. Buyers whose equipment requires a higher amp-hour rating or a different terminal layout should verify specifications before ordering. The three-year UPS warranty applies when used in backup power devices.

Highlights

  • Lasts 4-7 years with advanced AGM technology
  • Ready to install with included terminal screws
  • Fits existing UPS tray at 9.0 x 5.4 x 8.1 inches
  • Direct OEM replacement for UPS12-170 and UB12550
  • Zero upkeep required with maintenance-free sealed design

Specifications

No published specifications for this item yet.

Questions about this item

Will the 9.0 × 5.4 × 8.1 in PS-12550 fit the same tray and cable reach as my old 22NF 50 Ah unit?

Yes — the PS-12550 matches the 22NF footprint and terminal layout, so it drops into the existing tray and connects to the same cables without modification.

How can I verify the 12 V 55 Ah AGM block is delivering rated capacity after installation?

Charge fully, then apply a constant-current load equal to the 20-hour rate; the battery should sustain voltage above the maker's end-point for the full 20-hour period.

The box shows screws for terminals — are cables or a harness included, or must I reuse my old ones?

Only terminal screws are supplied; you must reuse your existing cables or buy new ring-terminal leads separately.

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