APC Replacement Batteries & RBC Packs

Keep your UPS running reliably with a new APC replacement battery from Battery Mart. We stock a wide range of high-quality battery packs and cartridges that fit both large server-room UPS systems and smaller home or office APC battery backup units. Every APC battery backup replacement battery is factory-fresh, in stock, and offered at a lower cost than APC OEM batteries, so you can restore backup power quickly without overpaying. Use our APC Battery Finder below to get the right fit fast.

Why Choose Battery Mart for Your APC Battery?

Fresh Batteries: We ship from our U.S. warehouse, ensuring you get a quality, factory-fresh battery.
Guaranteed Compatibility: Our APC replacement batteries are engineered to meet or exceed OEM specifications.
Expert Support: Our U.S.-based team is available to help you find the right battery or answer any questions.
Easy Returns: Backed by our 60-day money-back guarantee.

Find your model number

The APC UPS model number can be found on a sticker on either the bottom or rear of the UPS. The location and label sequence will vary by model.

Model Number

Serial Number

APC BackUPS

APC Matrix SmartCell

APC PowerCell

APC RM UPS Battery Module

APC SmartCell XR

APC SmartUPS

APC Symmetra

Narrow Your Results

Item #: APCRBC2 |

RBC2 Replacement Battery for APC

Item #: APCRBC2

Voltage: 12 Volt / 7 Ah

• Sealed Lead Acid
• Dimensions: 5.94" / 2.56" / 3.94"
• Weight: 5.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$33.95

Price: $33.95

Item #: APCRBC4 |

RBC4 Replacement Battery for APC

Item #: APCRBC4

Voltage: 12 Volt / 12 Ah

• Sealed Lead Acid
• Dimensions: 5.90" / 3.70" / 3.90"
• Weight: 8.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$53.95

Price: $53.95

Item #: APCRBC5 |

RBC5 Replacement Battery for APC

Item #: APCRBC5

Voltage: 24 Volt / 7 Ah

• Sealed Lead Acid
• Dimensions: 6.0" / 5.25" / 3.94"
• Weight: 10.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$66.95

Price: $66.95

Item #: APCRBC6 |

RBC6 Replacement Battery for APC

Item #: APCRBC6

Voltage: 24 Volt / 12 Ah

• Sealed Lead Acid
• Dimensions: 5.90" / 3.70" / 3.90"
• Weight: 15.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$129.95

Price: $129.95

Item #: APCRBC7 |

RBC7 Replacement Battery for APC

Item #: APCRBC7

Voltage: 24 Volt / 18 Ah

• Sealed Lead Acid
• Dimensions: 7.20" / 6.0" / 6.80"
• Weight: 23.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$163.95

Price: $163.95

Item #: APCRBC8 |

RBC8 Replacement Battery for APC

Item #: APCRBC8

Voltage: 48 Volt / 7 Ah

• Sealed Lead Acid
• Dimensions: 10.50" / 6.0" / 3.94"
• Weight: 19.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$129.95

Price: $129.95

Item #: APCRBC9 |

RBC9 Replacement Battery for APC

Item #: APCRBC9

Voltage: 24 Volt / 7 Ah

• Sealed Lead Acid
• Dimensions: 5.90" / 5.10" / 3.70"
• Weight: 10.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$70.95

Price: $70.95

Item #: APC-11 |

Replacement RBC-11 Rechargeable Battery Pack with SB® 50 Plug

Item #: APC-11

Voltage: 48 Volt / 18 Ah

• Sealed Lead Acid
• Dimensions: 7.2" / 6" / 6.8"
• Weight: 60.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$339.95

Price: $339.95

Item #: APCRBC11 |

RBC11 Replacement Battery for APC

Item #: APCRBC11

Voltage: 48 Volt / 18 Ah

• Sealed Lead Acid
• Dimensions: 7.20" / 5.60" / 6.80"
• Weight: 49.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$287.95

Price: $287.95

Item #: APCRBC12 |

RBC12 Replacement Battery for APC

Item #: APCRBC12

Voltage: 24 Volt / 14 Ah

• Sealed Lead Acid
• Dimensions: 10.50" / 6.0" / 3.94"
• Weight: 40.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$269.95

Price: $269.95

Item #: APCRBC17 |

RBC17 Replacement Battery for APC

Item #: APCRBC17

Voltage: 12 Volt / 9 Ah

• Sealed Lead Acid
• Dimensions: 5.94" / 2.52" / 3.74"
• Weight: 6.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$40.95

Price: $40.95

Item #: APCRBC18 |

RBC18 Replacement Battery for APC

Item #: APCRBC18

Voltage: 12 Volt / 9 Ah

• Sealed Lead Acid
• Dimensions: 4.02" / 11.89" / 1.34"
• Weight: 6.00 lbs
• Warranty: 2 Year
• See All Compatible Models

Price:
$69.95

Price: $69.95

"Batteries arrived on time as promised, correct items (UPS replacement batteries), packed very well, and were close to being fully charged. Am highly satisfied; will purchase again when I need more batteries."

"The web site was easy to use, the information accurate, the replacement battery works very well and it arrived within a couple of days. The experience could not have been better."

Frequently Asked Questions (FAQ)

What are APC batteries used for?

APC batteries are commonly used in Uninterruptible Power Supply (UPS) systems to deliver instant backup power and surge protection for electronics like computers, routers, and servers during outages. By keeping essential electronics temporarily powered, they help prevent data loss and damage from unexpected power outages.

How long do APC UPS batteries last?

Most APC UPS batteries last three to five years, but this can vary based on usage and environmental factors like temperature and humidity. For the best reliability, plan to replace your APC batteries every three to four years, especially in more critical applications, even if the unit is still functioning.

How do I know which replacement battery my UPS needs?

The easiest way is to use our APC Battery Finder, which matches your UPS device to the compatible battery. You can also find the part number (like RBC7 or RBC17) listed on the original battery pack inside your UPS. Matching this part number ensures proper fit, runtime, and electrical compatibility.

Are these batteries the same as APC's RBC packs?

No. We offer high-quality, non-OEM alternatives that are designed to be a direct fit and provide the same reliable performance as APC's trademarked RBC (Replacement Battery Cartridge) packs. Our batteries are a more affordable choice without sacrificing quality.

What are the signs that my UPS battery needs to be replaced?

Look for warning lights, error messages, or beeping alerts from your UPS. Other signs include reduced runtime during a power outage or the UPS failing to hold a charge. In these cases, it’s time to install a new battery to maintain protection.

Can I recycle my old APC UPS battery?

Yes. UPS batteries contain lead and must be recycled properly. Battery Mart accepts returns for recycling, helping ensure they are handled in an environmentally responsible way. You can also recycle your old battery at most local recycling centers or automotive parts stores that accept sealed lead-acid batteries.

Can I replace an APC UPS battery myself?

Yes, most APC UPS batteries are designed for easy, user-replaceable installation and don’t require special tools. Simply power down the UPS, disconnect it from all equipment and outlets, and follow the replacement instructions provided with the battery or in your UPS manual.