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BatteryClerk Prime FAST 1-2 day shipping to most of the USA
BatteryClerk Prime FAST 1-2 day shipping to most of the USA

UPS Batteries

Power outages shouldn’t mean downtime for your business. At BatteryClerk, we provide a wide range of high-quality replacement batteries for UPS systems, designed to keep your critical equipment running seamlessly during unexpected power disruptions. Our inventory features top brands, and our team of experts is here to help you find the perfect battery for your specific UPS model. With unbeatable prices and fast, reliable shipping, BatteryClerk ensures your business stays protected and operational. Don’t let power interruptions slow you down—shop now and keep your operations running smoothly

  • Compaq 295462-001 12V 18Ah UPS Replacement Battery
    $53.29 - $59.49
    $53.29 - $59.49
    $53.29 - $59.49
    $53.29

    AJC Battery Compatible with Compaq 295462-001 12V 18Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

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    $53.29 - $59.49
    $53.29 - $59.49
    $53.29 - $59.49
    $53.29
  • Clary UPS800VA1GSBS 12V 200Ah UPS Replacement Battery
    $742.09 - $742.09
    $742.09
    $742.09 - $742.09
    $742.09

    UPG Battery Compatible with Clary UPS800VA1GSBS 12V 200Ah UPS Battery

    AJC® Brand replacement compatible with a Clary UPS800VA1GSBS UPS Battery Voltage: 12V (12 Volts) Capacity: 200Ah (200000mAh) Terminals: L Post Che...

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    $742.09 - $742.09
    $742.09
    $742.09 - $742.09
    $742.09
  • Clary UPS1800VA1GSBSR 12V 200Ah UPS Replacement Battery
    $742.09 - $742.09
    $742.09
    $742.09 - $742.09
    $742.09

    UPG Battery Compatible with Clary UPS1800VA1GSBSR 12V 200Ah UPS Battery

    AJC® Brand replacement compatible with a Clary UPS1800VA1GSBSR UPS Battery Voltage: 12V (12 Volts) Capacity: 200Ah (200000mAh) Terminals: L Post C...

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    $742.09 - $742.09
    $742.09
    $742.09 - $742.09
    $742.09
  • Clary UPS1800VA1GSBS 4V 9Ah UPS Replacement Battery
    $43.69 - $43.69
    $43.69
    $43.69 - $43.69
    $43.69

    UPG Battery Compatible with Clary UPS1800VA1GSBS 4V 9Ah UPS Battery

    AJC® Brand replacement compatible with a Clary UPS1800VA1GSBS UPS Battery Voltage: 4V (4 Volts) Capacity: 9Ah (9000mAh) Terminals: F2 Chemistry: S...

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    $43.69 - $43.69
    $43.69
    $43.69 - $43.69
    $43.69
  • Clary UPS1800VA1GSBS 12V 2.2Ah UPS Replacement Battery
    $42.49 - $42.49
    $42.49
    $42.49 - $42.49
    $42.49

    UPG Battery Compatible with Clary UPS1800VA1GSBS 12V 2.2Ah UPS Battery

    AJC® Brand replacement compatible with a Clary UPS1800VA1GSBS UPS Battery Voltage: 12V (12 Volts) Capacity: 2.2Ah (2200mAh) Terminals: F1 Chemistr...

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    $42.49 - $42.49
    $42.49
    $42.49 - $42.49
    $42.49
  • Clary UPS1800VA1GR 12V 0.8Ah UPS Replacement Battery
    $38.29 - $38.29
    $38.29
    $38.29 - $38.29
    $38.29

    UPG Battery Compatible with Clary UPS1800VA1GR 12V 0.8Ah UPS Battery

    AJC® Brand replacement compatible with a Clary UPS1800VA1GR UPS Battery Voltage: 12V (12 Volts) Capacity: 0.8Ah (800mAh) Terminals: WL Chemistry: ...

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    $38.29 - $38.29
    $38.29
    $38.29 - $38.29
    $38.29
  • Clary UPS1800VA1GSL 12V 200Ah UPS Replacement Battery
    $742.09 - $742.09
    $742.09
    $742.09 - $742.09
    $742.09

    UPG Battery Compatible with Clary UPS1800VA1GSL 12V 200Ah UPS Battery

    AJC® Brand replacement compatible with a Clary UPS1800VA1GSL UPS Battery Voltage: 12V (12 Volts) Capacity: 200Ah (200000mAh) Terminals: L Post Che...

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    $742.09 - $742.09
    $742.09
    $742.09 - $742.09
    $742.09
  • Clary UPS1125K1GSBS 12V 9Ah UPS Replacement Battery
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49

    AJC Battery Compatible with Clary UPS1125K1GSBS 12V 9Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49
  • Clary UPS1125K1G 12V 9Ah UPS Replacement Battery
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49

    AJC Battery Compatible with Clary UPS1125K1G 12V 9Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49
  • Clary UPS11251GR 12V 9Ah UPS Replacement Battery
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49

    AJC Battery Compatible with Clary UPS11251GR 12V 9Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49
  • Best Technologies LI 950 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 950 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Technologies LI 750 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 750 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Technologies LI 675 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 675 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Technologies LI 520 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 520 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Technologies LI 2250 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 2250 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Technologies LI 1020 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 1020 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Technologies LI 720 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 720 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Power Unity UT8K 12V 9Ah UPS Replacement Battery
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49

    AJC Battery Compatible with Best Power Unity UT8K 12V 9Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49
  • Best Technologies LI 1420 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Technologies LI 1420 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Power Unity UT4K 12V 9Ah UPS Replacement Battery
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49

    AJC Battery Compatible with Best Power Unity UT4K 12V 9Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49
  • Best Power Pro 1000 12V 75Ah UPS Replacement Battery
    $199.69 - $199.69
    $199.69
    $199.69 - $199.69
    $199.69

    AJC Battery Compatible with Best Power Pro 1000 12V 75Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $199.69 - $199.69
    $199.69
    $199.69 - $199.69
    $199.69
  • Best Power Unity UT5K 12V 9Ah UPS Replacement Battery
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49

    AJC Battery Compatible with Best Power Unity UT5K 12V 9Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $27.49 - $27.49
    $27.49
    $27.49 - $27.49
    $27.49
  • Best Power Fortress Telecom 2250 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Power Fortress Telecom 2250 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49
  • Best Power Fortress Telecom 1800 12V 35Ah UPS Replacement Battery
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

    AJC Battery Compatible with Best Power Fortress Telecom 1800 12V 35Ah UPS Battery

    In stock

    Information 12V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed...

    View full details
    $101.49 - $101.49
    $101.49
    $101.49 - $101.49
    $101.49

Keep your data safe during emergencies and downtime with a UPS device. Just as important, keep your UPS device running with a reliable replacement or backup battery. BatteryClerk offers a wide range of affordable and reliable UPS replacement batteries for many top brands.

UPS Battery Replacement

UPS Battery Replacement

View our guide for installing UPS replacement batteries to ensure you get the most out of your new AJC brand battery.