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
Two rectangular 6V 12Ah AGM batteries with F2 terminals

BatteryJack inc.

BatteryJack inc. 5778 UB6120 F2 6V 12Ah pack of 2

SKU CH-FAXB-BE7Z9

Two 6 V 12 Ah sealed AGM batteries with 100 % OEM compatibility and over 90 % gas recombination

  • Pack of two covers both slots in one purchase
  • AGM glass-mat design keeps electrolyte sealed and leak-free
  • Over 90 % gas recombination eliminates water topping
  • Maintenance-free float life rated four to seven years
  • 100 % OEM fit for direct drop-in replacement

6V 12Ah AGM battery pack

This pack contains two 6V 12Ah sealed lead-acid batteries built with absorptive glass-mat technology. They serve as direct OEM replacements for compatible UPS units and backup devices. The maintenance-free design allows installation in any orientation without electrolyte leakage.

Capacity and runtime headroom

Each cell delivers 12Ah at 6V, providing a combined energy reserve suited to typical UPS loads during short outages. Runtime scales with the connected load; heavier draws will exhaust the capacity sooner while lighter loads extend the available backup time. The sealed AGM construction sustains steady voltage until the reserve is depleted.

Thermals and power behaviour

The recombination design recovers over 90% of gas generated during normal float charging, keeping internal pressure stable and eliminating the need for water top-ups. No active cooling is required and the batteries operate silently in standby or discharge. Self-discharge remains low during extended storage periods.

How it compares

Measured against everything we stock in UPS Replacement Batteries, at today’s prices. Recalculated every night.

Price $37.99
Typical for this category: the median of 3,915 items is $39.99.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

No published specifications for this item yet.

Questions about this item

Will the 6 V 12 Ah AGM batteries fit the same F2 terminals on my existing UPS?

Yes, the F2 terminal type matches the original UB6120 specification, so the pair drops straight into the same battery compartment without adapter cables.

How can I verify the pack is delivering the rated capacity after installation?

Run a self-test or load test on the UPS; a healthy set should sustain the rated load for the expected runtime and show a stable float voltage after charging.

Does the pack of two include any mounting brackets or wiring harnesses?

Only the two sealed AGM batteries are supplied; brackets, cables or terminal covers must be sourced separately if the UPS does not reuse the original hardware.

More in UPS Replacement Batteries

Similar items