We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular black sealed lead-acid battery with two silver terminals on top

BatteryJack inc.

BatteryJack inc. 12V 9AH UPS Replacement Battery for APC ES500 ES550

SKU CH-SZH0-307F3

12 V 9 Ah AGM sealed lead-acid battery with T2 terminals fits APC ES500 and ES550 UPS units

  • Reliable UPS backup with 100 % OEM-compatible fit for APC ES500 and ES550
  • Maintenance-free AGM design eliminates electrolyte leakage in any mounting position
  • 36-month warranty backs expected 4-to-7-year service life
  • Compact 5.94 × 2.56 × 3.72 in size fits standard battery compartments
  • Gas recombination system recovers over 90 % of generated gas for steady performance

Direct APC UPS replacement

This 12V 9AH sealed lead-acid battery fits APC ES500 and ES550 models along with compatible IBM and Belkin backup units. It uses AGM technology for leak-free operation in any orientation and meets IATA non-spillable classification. The 100% OEM replacement design restores runtime without modifications. Expected service life spans four to seven years under normal conditions.

Simple swap with T2 terminals

Installation requires disconnecting the UPS, opening the battery door and reconnecting the two T2 faston terminals to the matching leads. Polarity must match the original wiring or the unit will not start. The sealed AGM construction eliminates electrolyte handling, but the 13.16lb weight demands a firm grip during removal. No tools beyond a screwdriver for the cover are typically needed.

Verify model and dimensions first

Confirm the UPS label reads ES500 or ES550 before ordering, as other APC series use different terminal types or voltages. Check that the battery bay accepts the 5.94in length, 2.56in width and 3.72in height of this pack. Ensure the existing wiring uses T2 connectors; units with T1 terminals will not mate correctly. The 36-month warranty covers the battery only, not the UPS electronics.

Highlights

  • Reliable UPS backup with 100 % OEM-compatible fit for APC ES500 and ES550
  • Maintenance-free AGM design eliminates electrolyte leakage in any mounting position
  • 36-month warranty backs expected 4-to-7-year service life
  • Compact 5.94 × 2.56 × 3.72 in size fits standard battery compartments
  • Gas recombination system recovers over 90 % of generated gas for steady performance

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the 12V 9AH battery is working correctly after installing it in my APC ES500?

After installation, the UPS should power on normally and hold a charge during a self-test or brief power interruption; the sealed AGM design is maintenance-free, so no fluid checks are needed.

What comes in the box and do I need to buy cables or terminals separately?

The package includes the 12V 9AH sealed lead-acid battery with T2 terminals already fitted; no extra cables or terminals are required for a direct swap in compatible APC units.

Which capacity should I choose between the ES500 and ES550 models?

This 12V 9AH battery is a direct 100% OEM replacement for both the APC ES500 and ES550, so the same unit fits either model.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.