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
Rectangular 12V 5AH sealed AGM battery with recessed terminals measuring 5.51 by 1.89 by 4.0 inches

BatteryJack inc.

BatteryJack inc. B-6870 UPS Replacement Battery 12V 5AH

SKU CH-AC1V-PRFAZ

12 V 5 Ah sealed AGM battery replaces RBC21 in APC Back-UPS Office and Belkin Pro units, maintenance-free with a four-to-seven-year design life

  • Advanced AGM technology delivers reliable backup power
  • Expected battery life of 4-7 years ensures long-term protection
  • 100% OEM replacement fits APC BackUPS Office models
  • Maintenance-free sealed design eliminates upkeep
  • Compatible with RBC21 and numerous UPS units

12 V 5 AH UPS replacement battery

The BatteryJack inc. B-6870 is a 12 V 5 AH sealed lead-acid battery built with advanced AGM technology. It serves as a direct 100 % OEM replacement for the APC RBC21 cartridge and fits compatible Back-UPS Office and Belkin UPS units. The maintenance-free design offers an expected service life of four to seven years.

Compatibility check before ordering

Verify that your UPS model appears in the supported list, which includes APC Back-UPS Office 250, 280, 350, 400, 500 and BF-series units as well as several Belkin Pro and Regulator models. Confirm the physical dimensions of 5.51 in length, 1.89 in width and 4.0 in height match the battery compartment. Ensure the terminal style is recessed as specified.

Suitable for owners of listed APC

This battery suits users who need a drop-in replacement for the exact models named above. It is not for buyers whose UPS requires a different voltage, capacity or terminal layout. It is also not for installations that demand a larger amp-hour rating or a form factor outside the stated dimensions.

Highlights

  • Advanced AGM technology delivers reliable backup power
  • Expected battery life of 4-7 years ensures long-term protection
  • 100% OEM replacement fits APC BackUPS Office models
  • Maintenance-free sealed design eliminates upkeep
  • Compatible with RBC21 and numerous UPS units

Specifications

No published specifications for this item yet.

Questions about this item

What comes in the box and is any cable or hardware sold separately?

The package contains the 12 V 5 Ah AGM battery with recessed terminals measuring 5.51" x 1.89" x 4.0"; no extra cables or mounting hardware are included.

Which version should I choose for an APC Back-UPS Office 500 or a Belkin F6C600?

This B-6870 unit replaces RBC21 and fits the listed APC Back-UPS Office 250, 280, 350, 400C, 500, BF250, BF280, BF280C, BF350, BF350U, BF400C, BF500, BF500BB, BF500U, BK280 and Belkin F6C600, F6C650-SER-SB, F5C500, F5C510, F5C520 models.

What does the 5 Ah rating mean once the battery is installed in my UPS?

At 12 volts the 5 Ah cell delivers about 60 watt-hours; actual runtime depends on the connected load and the UPS efficiency curve.

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.