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
Black rectangular sealed battery with two terminals

BatteryJack inc.

BatteryJack inc. 12V 18AH Standard Battery

SKU CH-QW0Z-3R34R

A 12V 18AH sealed AGM battery with 90% gas recombination and 100% OEM replacement compatibility

  • 12V 18AH capacity powers UPS and backup systems
  • Advanced AGM technology enables maintenance-free operation
  • Sealed non-spillable design allows safe use in any position
  • Over 90% gas recombination extends expected life to 4-7 years
  • 100% OEM replacement for NP18-12 and compatible models

Purpose & Fit

The BatteryJack inc. 12V 18AH Standard Battery is a sealed AGM unit built as a 100% OEM replacement for NP18-12, 51814, 6FM17, 6-DZM-20 and 6-FM-18 models. It suits UPS units, alarm panels, emergency lighting and backup systems that require a maintenance-free 12 volt 18 ampere-hour power source. Buyers needing a higher capacity or a different voltage platform should look elsewhere.

Thermals, Noise & Power

The Absorptive Glass Mat system absorbs sufficient electrolyte to prevent leakage and enables gas recombination of over 90% during normal use. No electrolyte checks or water top-ups are required throughout the expected floating service life of 4 to 7 years. The sealed, non-spillable construction operates silently and without thermal management concerns in any mounting position.

Build & Connections

Sealed construction ensures no electrolyte can escape from the terminals or case, meeting International Air Transport Association non-spillable classification for safe transport. The position-free design allows installation upright, sideways or inverted without affecting performance or safety. Terminals match the referenced OEM part numbers for direct drop-in compatibility.

How it compares

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

Price $41.99
Pricier than about 90% of the 10,440 comparable items (median $10.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 12V 18AH AGM battery and which step do people often miss?

Mount the battery in any orientation, connect the red lead to the positive terminal and the black lead to the negative terminal, then torque the terminal bolts to the value shown in the equipment manual — skipping the torque step is the most common mistake.

What maintenance or replacement will the 12V 18AH AGM battery need later?

The sealed AGM design is maintenance-free for its 4-7 year expected life; no water or electrolyte checks are possible, so plan a full replacement once capacity drops below the needs of your UPS or backup device.

What limit appears first on the 12V 18AH AGM battery under sustained use?

Continuous discharge is limited by the 18 ampere-hour capacity; once that energy is depleted the voltage falls and the battery must be recharged before further use.

More in Household Batteries & Chargers

Similar items