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
Sealed 6V 5AH lead-acid battery in black rectangular case

BatteryJack inc.

BatteryJack inc. 6V 5AH UPS Replacement Battery UB645

SKU CH-2HHC-6SGTZ

Sealed 6 V 4.5 Ah AGM battery with 90 % gas recombination, direct OEM replacement for UB645 units

  • Reliable power with advanced AGM technology
  • Spill-proof sealed construction for safe operation in any position
  • Maintenance-free design with over 90% gas recombination
  • 100% OEM replacement compatible with UB645 models
  • Expected service life of 4 to 7 years

Product Identity

This BatteryJack 6V 5AH sealed lead-acid battery serves as a direct replacement for UB645 UPS units. It uses AGM technology and is built for maintenance-free operation in backup power applications. The non-spillable design meets air transport requirements and allows installation in any position. Buyers needing a higher capacity than 4.5AH or a different voltage should look elsewhere.

Compatibility Check

Verify that your UPS specifies a 6V 5AH battery and accepts the UB645 form factor before ordering. Confirm the terminal layout matches your existing unit to ensure a proper connection. The battery is classified as non-spillable for safe handling and shipping. Systems requiring a different voltage, chemistry, or physical size will not be compatible.

Sustained Load Behaviour

The AGM construction supports steady service and controls gas generation with over 90% recombination during normal use. Expected floating service life ranges from four to seven years without electrolyte checks or water additions. The sealed case prevents leakage from terminals or case walls during extended operation. Performance under continuous discharge will depend on the specific UPS load profile.

Highlights

  • Reliable power with advanced AGM technology
  • Spill-proof sealed construction for safe operation in any position
  • Maintenance-free design with over 90% gas recombination
  • 100% OEM replacement compatible with UB645 models
  • Expected service life of 4 to 7 years

Specifications

No published specifications for this item yet.

Questions about this item

Does the battery come with any cables or mounting hardware, or do I need to source those separately?

The unit is a standalone sealed lead-acid battery; cables and mounting hardware are not included and must be obtained separately.

The title lists both 5AH and 4.5AH — which capacity should I order for a UB645 device?

The 4.5AH rating is the standard specification for the UB645; the 5AH figure is a nominal maximum and both refer to the same physical pack.

What does the 90% gas recombination rate mean for everyday UPS runtime and upkeep?

It means over 90% of gas generated during charge and discharge is recombined internally, so the battery stays maintenance-free and requires no water top-ups.

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

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.