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Two sealed 12V 18Ah AGM batteries with nut and bolt terminals

BatteryJack inc.

BatteryJack inc. 12V 18Ah UPS Replacement Battery 2 Pack

SKU CH-40HJ-W3H23

Two 12 V 18 Ah AGM batteries replace Werker WKA12-18NB and other models in UPS, alarms and mobility devices

  • Reliable backup power with 12V 18Ah AGM capacity
  • Lasts four to seven years in typical UPS service
  • Sealed AGM design requires no watering or upkeep
  • Drop-in replacement for Werker WKA12-18NB and many OEM packs
  • Nut-and-bolt terminals simplify installation in alarms, scooters, UPS units

Direct UPS replacement

This pack supplies two 12 V 18 Ah AGM batteries built as 100 % OEM replacements for the Werker WKA12-18NB and a long list of equivalent part numbers. Advanced AGM chemistry makes them maintenance-free and sealed for safe indoor use. The design targets a four-to-seven-year service life in standby applications. They arrive new and ready to install in compatible UPS units, alarm panels, emergency lighting and mobility devices.

Drop-in fit for existing enclosures

Each block measures 7.13 in long, 3.00 in wide and 6.6 in high, weighing 12.5 lb, so it occupies the same footprint as the original cells. Nut-and-bolt terminals are included, allowing a direct connection to existing wiring without adapters. The sealed construction means no venting provisions are required, freeing installers from adding external gas management. Two units in the pack simplify swapping both batteries in dual-cell UPS trays at once.

Steady output over long discharges

AGM deep-cycle plates deliver consistent voltage through extended backup events rather than only short bursts. The chemistry resists capacity loss during repeated float charging, supporting the rated multi-year lifespan in fire-alarm, security and exit-sign systems. Self-discharge remains low during storage, so spares stay ready for scheduled maintenance windows. The two-year warranty covers the cells in non-UPS roles such as scooters and gate operators.

Highlights

  • Reliable backup power with 12V 18Ah AGM capacity
  • Lasts four to seven years in typical UPS service
  • Sealed AGM design requires no watering or upkeep
  • Drop-in replacement for Werker WKA12-18NB and many OEM packs
  • Nut-and-bolt terminals simplify installation in alarms, scooters, UPS units

Specifications

No published specifications for this item yet.

Questions about this item

How long will the 12 V 18 Ah AGM battery last before capacity drops under daily cycling?

The manufacturer rates the expected service life at four to seven years depending on depth of discharge and ambient temperature.

Does the sealed AGM design run hot or need ventilation when the UPS is on battery for hours?

The maintenance-free AGM cells are sealed and valve-regulated, so they emit no gas and produce minimal heat during extended discharge.

What terminal hardware must I already have to install these batteries in my UPS?

Each unit ships with nut-and-bolt terminals; you only need a compatible wrench or socket to secure the connections.

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