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Rectangular black sealed lead-acid battery with silver terminals

BatteryJack inc.

BatteryJack inc. RBC10 RBC21 PS-1251FP SLA Battery HC1217W HC1221W RBC 10

SKU CH-8M98-JBYKP

Sealed AGM battery replaces RBC10, RBC21, PS-1251FP, HC1217W and HC1221W units with maintenance-free operation and over 90 per cent gas recombination

  • Maintenance-free AGM design prevents electrolyte leakage
  • Sealed non-spillable construction safe for any orientation
  • Over 90% gas recombination extends service life
  • 100% OEM-compatible replacement for RBC10 RBC21 PS-1251FP
  • Expected 4-7 year lifespan with 2-year warranty

Replacement SLA Battery for UPS and Tools

This sealed lead-acid battery replaces models including RBC10, RBC21, PS-1251FP, HC1217W and HC1221W. It uses advanced AGM technology with a gas recombination system that recombines over 90 percent of generated gas. The maintenance-free design requires no electrolyte checks or water additions during its expected service life.

Check Voltage and Dimensions Before Ordering

Verify that your device specifies a compatible 12 V SLA battery with the same physical footprint and terminal layout as the original pack. Confirm the required capacity and connector polarity match the unit you are replacing. The battery is classified as non-spillable for safe transport in any orientation.

Sealed AGM Construction for Any Position Mounting

The absorptive glass mat system absorbs sufficient electrolyte to prevent leakage from the separator or case. This sealed construction allows safe, efficient operation in any position without spill risk. A three-year warranty covers UPS and backup applications while a two-year warranty applies to all other devices.

How it compares

Measured against everything we stock in Disposable & Rechargeable Batteries, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 68% of the 985 comparable items (median $28.99).

Specifications

No published specifications for this item yet.

Questions about this item

Does the RBC10 battery arrive ready to install or do I need to buy terminals or cables separately?

The unit is a sealed, maintenance-free SLA battery with AGM construction and non-spillable certification; no extra terminals, cables or electrolyte are required for installation.

Which model number matches my UPS — RBC10, RBC21, PS-1251FP, HC1217W or HC1221W?

All five codes reference the same 12 V replacement; choose the one printed on your original battery or listed in the UPS manual.

What does the 90 % gas recombination figure mean for daily UPS use?

Over 90 % of gas generated during normal operation recombines internally, so the battery stays sealed, requires no watering and can run in any orientation for its 4–7 year design life.

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