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Two rectangular 12V 9Ah AGM batteries, dark plastic cases, T2 terminals, 5.94 by 2.56 by 3.66 inches

PowerStar

PowerStar PS12-9 2-Pack 12V 9Ah UPS Replacement Battery

SKU CH-N94Q-80VAC

Two 12 V 9 Ah AGM batteries sized 5.94 in x 2.56 in x 3.66 in with T2 terminals for APC BX900R UPS units

  • AGM technology provides maintenance-free operation
  • Two 12V 9Ah batteries deliver 100% OEM replacement for APC BX900R
  • Compact 5.94 x 2.56 x 3.66 inch size fits tight UPS bays
  • T2 quarter-inch terminals ensure secure, tool-less connections
  • Three-year warranty backs reliable 4-7 year expected service life

Two-pack UPS replacement batteries

This two-pack supplies direct replacements for the APC Back-UPS XS 900 BX900R. Each unit is a sealed lead-acid AGM battery rated at 12 V and 9 Ah. The pair restores runtime for home-office or small-business UPS units that have reached end of life.

AGM build with T2 terminals

Advanced AGM technology makes the cells maintenance-free and spill-proof in any orientation. Dimensions of 5.94 in by 2.56 in by 3.66 in match the original battery cavity. The 1/4 inch T2 terminals slide onto the existing wiring harness without adapters or soldering.

9 Ah capacity per battery

Capacity of 9 Ah per cell determines whether the pack meets the original runtime specification. Verify that the UPS label calls for 12 V 9 Ah blocks before ordering. Buyers who need a different amp-hour rating or a single-battery configuration should look elsewhere.

Highlights

  • AGM technology provides maintenance-free operation
  • Two 12V 9Ah batteries deliver 100% OEM replacement for APC BX900R
  • Compact 5.94 x 2.56 x 3.66 inch size fits tight UPS bays
  • T2 quarter-inch terminals ensure secure, tool-less connections
  • Three-year warranty backs reliable 4-7 year expected service life

Specifications

No published specifications for this item yet.

Questions about this item

What terminal standard does the PS12-9 use and what gauge wire does it accept?

The T2 terminals are 1/4 inch faston tabs that accept standard crimp lugs for 12 AWG wire.

What are the exact dimensions of each battery so I can verify fit inside my APC BX900R?

Each battery measures 5.94 in length by 2.56 in width by 3.66 in height, matching the original APC BX900R battery compartment.

How do I install the two-pack correctly and what polarity mistake should I avoid?

Connect the batteries in series by linking the positive terminal of the first battery to the negative terminal of the second, then attach the UPS leads to the remaining free terminals, ensuring red goes to positive and black to negative.

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