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Rectangular black battery cartridge with terminals on top

Tripp Lite

Tripp Lite RBC51 12V UPS Replacement Battery Cartridge

SKU CH-Q100-NF71H

12V maintenance-free lead-acid cartridge restores UPS runtime with 3–5 year life and 4-hour recharge

  • Reliable power for high-rate UPS discharge with 12V DC output
  • Maintenance-free lead-acid design delivers 3 to 5 years of battery life
  • Compact cartridge fits existing UPS at 3.69" x 2.5" x 5.88
  • Recharges in around 4 hours for quick return to service
  • Operates from 32°F to 104°F with up to 95% non-condensing humidity

Tripp Lite RBC51 12V UPS Battery Cartridge

This 12V replacement battery cartridge restores runtime to compatible UPS units. It uses a maintenance-free lead-acid design built for high-rate discharge applications. The cartridge includes an instruction manual covering installation and recycling. Expected battery life spans three to five years under normal use.

Fits UPS units needing cartridge 51.

The cartridge suits owners of UPS systems that accept the RBC51 form factor. It operates between 32 and 104 degrees Fahrenheit with up to 95 percent non-condensing humidity. Buyers whose UPS requires a different cartridge size or voltage should look elsewhere. Recharge time is approximately four hours.

12V maintenance-free lead-acid chemistry

The decisive specification is the 12V maintenance-free lead-acid chemistry matched to the RBC51 form factor. Dimensions are 3.69 inches high, 2.5 inches wide and 5.88 inches deep. The unit carries an 18-month standard warranty. Verify your UPS model accepts this exact cartridge before purchase.

Highlights

  • Reliable power for high-rate UPS discharge with 12V DC output
  • Maintenance-free lead-acid design delivers 3 to 5 years of battery life
  • Compact cartridge fits existing UPS at 3.69" x 2.5" x 5.88
  • Recharges in around 4 hours for quick return to service
  • Operates from 32°F to 104°F with up to 95% non-condensing humidity

Specifications

No published specifications for this item yet.

Questions about this item

How much heat does the 12 V lead-acid cartridge add when the UPS runs continuously all day?

The cartridge operates at 32 °F to 104 °F with 0 to 95 % non-condensing humidity; it generates no active heat of its own beyond normal battery warmth during discharge and recharge cycles.

What UPS hardware must I already own for this RBC51 cartridge to fit and connect?

You need a compatible UPS that accepts the RBC51 form factor — 3.69 in high × 2.5 in wide × 5.88 in deep — and uses a 12 V maintenance-free lead-acid cartridge; the package includes an installation manual but no extra cables or brackets.

Will the RBC51 work reliably in an older UPS that has been running on its original batteries for several years?

Yes — it is designed for high-rate discharge applications and meets the original manufacturer specifications, so it restores runtime in aging UPS units; typical service life is 3 to 5 years and recharge takes about 4 hours.

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