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PowerStar Battery 12V 9Ah APC DL3000RM3U, DL3000RMI3U UPS Battery
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  • $39.88 
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12V Battery for APC IBM Belkin UPS Backup Systems ES500 ES550
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12V Battery for APC IBM Belkin UPS Backup Systems ES500 ES550
  • Parts: 2 Year Warranty
  • Model #: PS12-9-00095
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  • $39.88 
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PowerStar-- 12V 7AH Sealed Lead Acid Battery for APC Model SU700RMNET UPS
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  • $39.88 
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Eaton 9SX 36 Tower EBM
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Eaton 9SX 36 Tower EBM
  • Brand: EATON
  • Series: External Battery Pack
  • Part Number: 9SXEBM36
  • Type: Battery
  • Model #: 9PXEBM36
PowerStar--12v 8ah UPS Battery replaces 7ah BB Battery BP7-12-T2, BP7-12T
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  • $39.88 
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RBC35 Replacement Battery Cartridge for APC Back-UPS ES BE325-CN / BE325R
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  • $48.88 
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PowerStar-- RBC35 Replacement Battery Cartridge for APC Back-UPS ES BE350C / BE350R
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  • $22.88 
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12V 18AH UPS Battery Replaces 20Ah BB Battery HR22-12, HR2212
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12V 18AH UPS Battery Replaces 20Ah BB Battery HR22-12, HR2212
  • Parts: 2 Year Warranty
  • Model #: PS12-18-72
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  • $59.88 
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RBC7 SU1400 SUA1500 SU700 APC Replacement Battery Cartridge UPS
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RBC7 SU1400 SUA1500 SU700 APC Replacement Battery Cartridge UPS
  • Parts: 2 Year Warranty
  • Model #: PS12-18-2Pack-10
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  • $115.88 
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2 Pack - 12V 18AH APC Back UPS Pro 1400 Replacement SLA Battery
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2 Pack - 12V 18AH APC Back UPS Pro 1400 Replacement SLA Battery
  • Parts: 2 Year Warranty
  • Model #: PS12-18-2Pack-09
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  • $115.88 
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PowerStar Battery 12V 8Ah Belkin Pro F6C750AVR UPS Battery UPGRADED 9AH
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  • $39.88 
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PowerStar Battery For Geek Squad (Best Buy) GS-700U UPS Battery
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PowerStar Battery For Geek Squad (Best Buy) GS-700U UPS Battery
  • Parts: 2 Year Warranty
  • Model #: PS12-9-855412365
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  • $39.88 
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PowerStar® Battery for Tripp Lite Model Office 500 UPS 3 Year Warranty
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  • $39.88 
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12V 18AH UPS Battery Replaces 20Ah BB Battery HR22-12, HR2212 - 2 Pack
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  • $115.88 
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12VOLT 7AMP HOUR RECHARGEABLE SEALED LEAD ACID 12V 7AH BATTERY UPS ALARM BACKUP
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  • $35.88 
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PowerStar RBC5 RBC9 RBC22 RBC32 RBC33 RBC48 APC UPS SU450NET
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  • $39.88 
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RBC21 - 12V / 5Ah Sealed Lead Acid UPS Replacement Battery - BBBP5512RT
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  • $23.88 
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BACK-UPS XS 1300VA BX1300LCD REPLACEMENT BATTERY (2) 12V 7.0ah Batteries
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  • $49.88 
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12v 7Ah Replacement Battery for Best Power LI 750 BAT-0062 Replaces (9Ah) UPS
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  • $35.88 
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Eaton ASY-0612 Battery Cabinet
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Refurbished Eaton ASY-0612 Battery Cabinet
  • Type: Battery Enclosure
  • Model #: ASY-0612
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  • $614.49 
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GREENTECH DIY WIRING KIT FOR APCRBC123 APCRBC124 RBC123 RBC124 SLA123 SLA124 - INCLUDES PLASTIC BRACKET, JUMPER CABLE, RED POSITIVE WIRE, BLACK NEGATIVE WIRE (BATTERIES NOT INCLUDED)
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GREENTECH DIY WIRING KIT FOR APCRBC123 APCRBC124 RBC123 RBC124 SLA123 SLA124 - INCLUDES PLASTIC BRACKET, JUMPER CABLE, RED POSITIVE WIRE, BLACK NEGATIVE WIRE (BATTERIES NOT INCLUDED)

Limited time offer, ends 04/14

  • Part Number: RBC123-RBC124-WIRE-KIT
  • Compatibility: APCRBC123, APCRBC124, RBC123, RBC124, SLA123, SLA124
  • Model #: GTS-RBC123-RBC124-WIRE-KIT
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  • $31.35 
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Powerstar battery for Casil CA1290 12v 7.5ah for APC DLA1500RM2U
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Powerstar battery for Casil CA1290 12v 7.5ah for APC DLA1500RM2U
  • Parts: 2 Year Warranty
  • Model #: AGM1275F2-64
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  • $22.88 
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PowerStar®RBC5 UPS Computer Power Backup System Complete Replacement Battery Kit
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  • $59.99 
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Replacement Genesis NPW45-12, NPW 45-12 12V 9Ah UPS Battery by POWERSTAR
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  • $39.88 
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12V 3.4Ah Replacement Battery for APC BackUPS ES BE350C RBC35
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12V 3.4Ah Replacement Battery for APC BackUPS ES BE350C RBC35
  • Parts: 2 Year Warranty
  • Model #: PS12-3.3-212
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  • $22.88 
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PowerStar--PoweStar® 12V 9Ah Ion Block Rocker UPS Audio Battery--
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  • $39.88 
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12V 10AH Industrial AGM Battery for UPS, Emergency Lighting, Security.
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  • $37.88 
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HIGH RATE BUILT APC Replacement 12V 3.4Ah Battery Cartridge #35 RBC35 - Non OEM
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  • $22.88 
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PowerStar Brand--Battery 12V 7AH SLA Battery for Razor Dirt Quad / Ground Force - 2 Pack -NOW 9AH
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  • $59.99 
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12V 9AH SLA Battery Replaces CP1290 6-DW-9 HR9-12 PS-1290F2 - TRUE 9AH BATTERY
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  • $39.88 
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Eaton 744-A1974 Replacement Battery - For 9PX and 9SX UPS
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  • $656.97 
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PowerStar® 9APC Back UPS 300 Replacement SLA Battery - 3 YEAR WARRANTY
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  • $39.88 
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PowerStar 12V 18AH UPS Battery Replaces Vision CP12180D, CP 12180D
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  • $59.88 
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12V 3.3AH SLA Battery for APC BE325 BE325CN RBC47 PS-1230 - POWERSTAR
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  • $22.88 
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12V 7A Battery for APC RBC5 RBC9 RBC22 RBC32 RBC33 Replaces ZEUS PC7-12
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  • $49.88 
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Whether you have a busy data center or web servers that need to be constantly online, UPS accessories help you ensure that your surge protection system is efficient at all times. Make sure to consider the coverage time provided by the UPS power bank, and to have replacement batteries for your UPS system if required.

The UPS Protects Data and Keeps the System Running

UPS stands for “Uninterruptible Power Supply”. This device is essential in mission-critical environments and data centers since it prevents downtime in case of electrical failure. It’s able to provide backup power, allow the computer or server to shut down properly and prevent data loss. Different types of UPS surge protectors are capable of providing backup power for different amounts of time. You can also set them up to alert the server when the battery is running low, so it will shut down correctly before the power source fails. 

Know When It’s Time to Get UPS Replacement Batteries

The battery in your UPS surge protector wears out over time, just like the ones inside your laptop and smartphone. It gradually loses its original capacity. Some UPS models test their batteries regularly to make sure they can offer enough backup power for the right amount of time. Use software to monitor how fast the battery loses capacity, or take note of the time it takes to go off. Luckily, UPS replacement batteries are easy to find and install. As a rule of thumb, you should replace the battery every three or four years.  Most UPS power supplies have a battery slot that's similar to the one on your laptop where you can find the worn-out battery.

UPS Network Management Cards Let You Monitor Your UPS Power Supply Via a Secure Network 

UPS network management cards, like the APC® AP9631 and APC AP9630, add extra functionalities to your UPS surge protector. They allow you to monitor your UPS system via a secure network browser using the IPv6 protocol. They use device encryption to connect via HTTPS/SSL, SSH and SNMPv3. These UPS accessories also notify you when a problem occurs, so you’ll be able to prevent downtime or data losses. Network management cards offer data and event logs to help you identify problems in advance.

External Battery Packs Extend the Uptime of Your UPS Surge Protector

Some UPS models can work with external batteries to offer even more protection from electrical failure. They work similarly to the power banks you use for your smartphone, as they extend the runtime of the UPS power supply after the battery inside has died. Most external battery packs come with a cord, which goes into a dedicated connector. Some models, like the Tripp Lite® BP72V18-2US, have daisy-chain connectors to add multiple battery packs to the same UPS surge protector. Many external UPS batteries have unique designs that allow you to stack them in racks and create a tidy set up in a data center. Browse Newegg to find all of the available power supplies today.

Bestselling UPS Accessories Reviews:

Chris M.
8/30/2025 6:26:54 AM
It had over an 80% charge when it arrived

“ Changing these batteries out is a PIA because of the number of things that are plugged into the UPS. ”

CyberPower RB1270X2A UPS Replacement Battery Cartridge 12V 7AH
Anonymous
7/25/2025 3:45:05 AM
Perfect replacement

“ You can't buy generic batteries for my UPS, I think due to the proprietary connector they use. ”

APC by Schneider Electric Replacement Battery Cartridge #161 APCRBC161
Thomas D.
3/21/2025 6:30:08 AM
Solved My Problem

“ This happened about 3 times before I suspected my UPS. ”

PowerStar--Replacement UB1290 12V 9Ah APC UPS Computer Back Up Power Battery - 2 Pack
David C.
1/25/2025 3:39:13 PM
Perfect replacement

“ According to the UPS, estimate time with the same setup seems to indicate more time than with the original battery. ”

APC by Schneider Electric Replacement Battery Cartridge #161 APCRBC161
Joseph D.
1/11/2025 9:22:25 AM
Prompt delivery, perfect fit!

“ Looking forward to a few years of trouble-free UPS-ing. ”

APC by Schneider Electric Replacement Battery Cartridge #161 APCRBC161
Gary R.
12/1/2024 5:06:45 PM
Much better than my do-it-yourself solution

“ Battery pack fits into the UPS easily. ”

CyberPower RB1290X4F Battery Kit
David M.
6/21/2024 7:49:36 AM
Great product

“ Unfortunately the day after I ordered the battery we had a power surge and POP the UPS system is dead. ”

APC UPS Battery Replacement for APC UPS Models BR1500G, BR1300G, BX1500M, BX1500G, SMC1000-2U, SMC1000-2UC, BR1500GI, SMC1000-2U, SMC1000-2UC and select others (APCRBC124)
Jake J.
6/19/2024 10:34:35 PM
Keeping my Beloved APC going...

“ HDD failures before using an uninterrupted power supply unit: 3 ”

APC UPS Battery Replacement for APC UPS Model BR1000G, BX1350M, BN1350G, BR900GI, BX1000G, BX1300G, SMT750RM2U, SMT750RM2UC, SMT750RM2UNC, and select others (APCRBC123)