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Rectangular black sealed lead-acid battery with two terminals on top

BatteryJack inc.

BatteryJack inc. 12V 18AH SLA Battery for Briggs & Stratton Generator B4489GS 193043GS

SKU CH-8C6K-FJZAE

12V 18Ah sealed lead-acid battery with AGM technology fits Briggs & Stratton generators B4489GS and 193043GS, offering maintenance-free operation and over 90% gas recombination

  • 12V 18AH capacity powers Briggs & Stratton generators reliably
  • Advanced AGM technology enables maintenance-free operation
  • Sealed construction prevents electrolyte leakage in any position
  • Gas recombination system recycles over 90% of generated gas
  • 100% OEM replacement fits models B4489GS and 193043GS

12V 18AH SLA Battery

This 12-volt 18-ampere-hour sealed lead-acid battery uses advanced AGM technology to provide maintenance-free backup power. It is built as a 100 percent OEM replacement for Briggs & Stratton generator models B4489GS and 193043GS. The sealed construction prevents electrolyte leakage and allows safe operation in any position. Gas recombination exceeds 90 percent during normal use.

UPS and Generator Backup

It suits owners of the specified Briggs & Stratton generators who need a direct-fit replacement for starting and backup duty. It also fits UPS units that accept a 12V 18AH SLA block with matching terminals. Buyers who need a different voltage, a higher capacity, or a lithium chemistry should look at other options. The battery is not designed for deep-cycle traction applications.

90% Gas Recombination Rate

The single specification that decides fitment is the 90-percent gas recombination rate delivered by the AGM system. This feature eliminates water loss and enables the maintenance-free, position-free operation required by the original generator design. If your application demands a flooded cell or a lower recombination efficiency, this battery will not match the OEM requirements.

How it compares

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

Price $43.99
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

Does the 12 V 18 Ah AGM battery generate noticeable heat or noise during continuous generator use?

The sealed AGM design runs silently with no moving parts; normal float charging produces only minimal warmth that the case dissipates without active cooling.

What existing connections or hardware must the generator already have for this battery to install directly?

The generator needs standard 12 V lead-acid terminals matching the original B4489GS / 193043GS layout so the replacement drops in without adapters.

Will this 18 Ah unit charge correctly from the older Briggs & Stratton charging circuit designed for the original battery?

Yes — it is a 100 % OEM-spec replacement, so the generator’s existing regulator charges it within the same voltage window as the factory pack.

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