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Rectangular sealed lead-acid battery block, matte grey case, two terminals on top

BatteryJack inc.

BatteryJack inc. PS-12550 12 Volt 55 Amp Hour UPS Replacement Battery

SKU CH-YR49-VAN4A

12 V 55 Ah sealed lead-acid battery with AGM technology and over 90 % gas recombination for maintenance-free UPS backup

  • Reliable 12 volt power for UPS systems
  • 55 amp hour capacity supports extended backup runtime
  • Sealed AGM design prevents electrolyte leakage in any position
  • Gas recombination exceeds 90 percent for maintenance free operation
  • 100 percent OEM compatible replacement fits existing equipment

12 Volt 55 Amp Hour UPS Battery

The BatteryJack PS-12550 is a sealed lead-acid unit built as a direct OEM replacement for uninterruptible power supplies. It uses absorptive glass mat technology to deliver 55 amp hours at 12 volts without electrolyte maintenance. The non-spillable design meets air-transport requirements and operates safely in any orientation. It suits administrators who need a drop-in battery for existing UPS hardware.

Thermals noise and power draw

Sealed AGM construction eliminates liquid electrolyte, so the battery runs silently and produces no fumes during normal float service. Gas recombination handles over 90 percent of generated gas internally, keeping the case sealed and the surrounding equipment clean. No watering or specific-gravity checks are required across the expected 4-7 year service life. The maintenance-free format reduces operational overhead for rack-mounted or cabinet installations.

Sustained load behaviour

Under continuous discharge the AGM separators maintain steady voltage delivery while the recombination cycle manages internal pressure without venting. The 100 percent OEM-compatible form factor ensures consistent fit and electrical contact throughout extended runtime events. A three-year warranty covers UPS and backup deployments, while other applications carry a two-year term. Buyers needing higher capacity or alternative chemistries should consider other models.

Highlights

  • Reliable 12 volt power for UPS systems
  • 55 amp hour capacity supports extended backup runtime
  • Sealed AGM design prevents electrolyte leakage in any position
  • Gas recombination exceeds 90 percent for maintenance free operation
  • 100 percent OEM compatible replacement fits existing equipment

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the PS-12550 battery in my UPS and which orientation mistake should I avoid?

The sealed AGM construction allows operation in any position without electrolyte leakage, so orientation is not restricted; simply match the 12 Volt polarity and secure the terminals.

What maintenance or replacement will the PS-12550 need during its 4-7 year expected life?

The maintenance-free design requires no water top-ups or specific gravity checks; plan a full replacement once capacity drops below useful levels after the expected service life.

At what sustained discharge rate does the PS-12550 hit its voltage limit first?

The 55 Amp Hour rating defines the capacity envelope; continuous loads that exceed the rated discharge current will reach the voltage cut-off sooner than lighter loads.

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