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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

  • Original price $8.19 - Original price $9.99
    Original price
    $8.19 - $9.99
    $8.19 - $9.99
    Current price $8.19

    AJC Battery Compatible with Universal Power Group UB645WL UB4.5-6WL 6V 4.5Ah UPS Battery

    In stock

    Information 6V 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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    Original price $8.19 - Original price $9.99
    Original price
    $8.19 - $9.99
    $8.19 - $9.99
    Current price $8.19
  • Original price $17.49 - Original price $18.49
    Original price
    $17.49 - $18.49
    $17.49 - $18.49
    Current price $17.49

    AJC Battery Compatible with Universal Power Group UB1250 12V 4.5Ah 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
    Original price $17.49 - Original price $18.49
    Original price
    $17.49 - $18.49
    $17.49 - $18.49
    Current price $17.49
  • Original price $18.49 - Original price $18.49
    Original price
    $18.49
    $18.49 - $18.49
    Current price $18.49

    AJC Battery Compatible with Universal Power Group UB1250 12V 5Ah 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
    Original price $18.49 - Original price $18.49
    Original price
    $18.49
    $18.49 - $18.49
    Current price $18.49
  • Original price $11.79 - Original price $11.79
    Original price
    $11.79
    $11.79 - $11.79
    Current price $11.79

    AJC Battery Compatible with Universal Power Group UB670 6V 7Ah UPS Battery

    In stock

    Information 6V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed ...

    View full details
    Original price $11.79 - Original price $11.79
    Original price
    $11.79
    $11.79 - $11.79
    Current price $11.79
  • Original price $90.39 - Original price $90.39
    Original price
    $90.39
    $90.39 - $90.39
    Current price $90.39

    UPG Battery Compatible with UB12150 12V 15Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal Power UPS Batteries Terminal: F2 Volts: 12V (12 Volt) Ah: 15Ah (15000mAh) Universal...

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    Original price $90.39 - Original price $90.39
    Original price
    $90.39
    $90.39 - $90.39
    Current price $90.39
  • Original price $147.19 - Original price $147.19
    Original price
    $147.19
    $147.19 - $147.19
    Current price $147.19

    AJC Battery Compatible with Universal Power Group UB12550 12V 55Ah 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
    Original price $147.19 - Original price $147.19
    Original price
    $147.19
    $147.19 - $147.19
    Current price $147.19
  • Original price $42.49 - Original price $42.49
    Original price
    $42.49
    $42.49 - $42.49
    Current price $42.49

    UPG Battery Compatible with Universal UB1222 12V 2.2Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal UPS Batteries Terminal: F1 Volts: 12V (12 Volt) Ah: 2.2Ah (2200mAh) Replacement Ba...

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    Original price $42.49 - Original price $42.49
    Original price
    $42.49
    $42.49 - $42.49
    Current price $42.49
  • Original price $276.89 - Original price $276.89
    Original price
    $276.89
    $276.89 - $276.89
    Current price $276.89

    UPG Battery Compatible with UB12500 12V 50Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal Power UPS Batteries Terminal: L2 Volts: 12V (12 Volt) Ah: 50Ah (50000mAh) Universal...

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    Original price $276.89 - Original price $276.89
    Original price
    $276.89
    $276.89 - $276.89
    Current price $276.89
  • Original price $101.59 - Original price $101.59
    Original price
    $101.59
    $101.59 - $101.59
    Current price $101.59

    AJC Battery Compatible with Universal Power Group UB12330 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
    Original price $101.59 - Original price $101.59
    Original price
    $101.59
    $101.59 - $101.59
    Current price $101.59
  • Original price $19.79 - Original price $19.79
    Original price
    $19.79
    $19.79 - $19.79
    Current price $19.79

    AJC Battery Compatible with Universal Power Group UB6120 6V 12Ah UPS Battery

    In stock

    Information 6V 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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    Original price $19.79 - Original price $19.79
    Original price
    $19.79
    $19.79 - $19.79
    Current price $19.79
  • Original price $41.89 - Original price $46.59
    Original price
    $41.89 - $46.59
    $41.89 - $46.59
    Current price $41.89

    AJC Battery Compatible with Universal Power Group UB12120 12V 12Ah 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
    Original price $41.89 - Original price $46.59
    Original price
    $41.89 - $46.59
    $41.89 - $46.59
    Current price $41.89
  • Original price $42.49 - Original price $42.49
    Original price
    $42.49
    $42.49 - $42.49
    Current price $42.49

    UPG Battery Compatible with UB1222 12V 2.2Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal Power UPS Batteries Terminal: F1 Volts: 12V (12 Volt) Ah: 2.2Ah (2200mAh) Universal...

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    Original price $42.49 - Original price $42.49
    Original price
    $42.49
    $42.49 - $42.49
    Current price $42.49
  • Original price $211.49 - Original price $211.49
    Original price
    $211.49
    $211.49 - $211.49
    Current price $211.49

    AJC Battery Compatible with Universal Power Group UB121100 12V 100Ah 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
    Original price $211.49 - Original price $211.49
    Original price
    $211.49
    $211.49 - $211.49
    Current price $211.49
  • Original price $51.99 - Original price $51.99
    Original price
    $51.99
    $51.99 - $51.99
    Current price $51.99

    UPG Battery Compatible with Universal UB634 6V 3.4Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal UPS Batteries Terminal: F1 Volts: 6V (6 Volt) Ah: 3.4Ah (3400mAh) Replacement Batt...

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    Original price $51.99 - Original price $51.99
    Original price
    $51.99
    $51.99 - $51.99
    Current price $51.99
  • Original price $70.29 - Original price $70.29
    Original price
    $70.29
    $70.29 - $70.29
    Current price $70.29

    UPG Battery Compatible with UB12100-S 12V 10Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal Power UPS Batteries Terminal: F2 Volts: 12V (12 Volt) Ah: 10Ah (10000mAh) Universal...

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    Original price $70.29 - Original price $70.29
    Original price
    $70.29
    $70.29 - $70.29
    Current price $70.29
  • Original price $276.89 - Original price $276.89
    Original price
    $276.89
    $276.89 - $276.89
    Current price $276.89

    UPG Battery Compatible with Universal UB12400 12V 50Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal UPS Batteries Terminal: L2 Volts: 12V (12 Volt) Ah: 50Ah (50000mAh) Replacement Ba...

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    Original price $276.89 - Original price $276.89
    Original price
    $276.89
    $276.89 - $276.89
    Current price $276.89
  • Original price $211.49 - Original price $211.49
    Original price
    $211.49
    $211.49 - $211.49
    Current price $211.49

    AJC Battery Compatible with Universal Power Group UB121000 12V 100Ah 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
    Original price $211.49 - Original price $211.49
    Original price
    $211.49
    $211.49 - $211.49
    Current price $211.49
  • Original price $9.99 - Original price $9.99
    Original price
    $9.99
    $9.99 - $9.99
    Current price $9.99

    AJC Battery Compatible with Universal Power Group UB650S 6V 5Ah UPS Battery

    In stock

    Information 6V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed ...

    View full details
    Original price $9.99 - Original price $9.99
    Original price
    $9.99
    $9.99 - $9.99
    Current price $9.99
  • Original price $17.49 - Original price $18.49
    Original price
    $17.49 - $18.49
    $17.49 - $18.49
    Current price $17.49

    AJC Battery Compatible with Universal Power Group UB1245 12V 4.5Ah 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
    Original price $17.49 - Original price $18.49
    Original price
    $17.49 - $18.49
    $17.49 - $18.49
    Current price $17.49
  • Original price $53.39 - Original price $58.99
    Original price
    $53.39 - $58.99
    $53.39 - $58.99
    Current price $53.39

    AJC Battery Compatible with Universal Power Group UB12180 12V 18Ah UPS Battery

    In stock

    Original price $53.39 - Original price $58.99
    Original price
    $53.39 - $58.99
    $53.39 - $58.99
    Current price $53.39
  • Original price $58.99 - Original price $58.99
    Original price
    $58.99
    $58.99 - $58.99
    Current price $58.99

    AJC Battery Compatible with Universal Power Group UB12220 12V 22Ah 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
    Original price $58.99 - Original price $58.99
    Original price
    $58.99
    $58.99 - $58.99
    Current price $58.99
  • Original price $66.69 - Original price $66.69
    Original price
    $66.69
    $66.69 - $66.69
    Current price $66.69

    UPG Battery Compatible with UB685 6V 8.5Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal Power UPS Batteries Terminal: F1 Volts: 6V (6 Volt) Ah: 8.5Ah (8500mAh) Universal P...

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    Original price $66.69 - Original price $66.69
    Original price
    $66.69
    $66.69 - $66.69
    Current price $66.69
  • Original price $466.99 - Original price $466.99
    Original price
    $466.99
    $466.99 - $466.99
    Current price $466.99

    UPG Battery Compatible with Group 27 UB62000 Sealed AGM UPS Backup StandBy 6V 200Ah UPS Battery

    This is an UPG® Brand replacement compatible with Universal Power UPS Batteries Terminal: Internal Threaded Post Volts: 6V (6 Volt) Ah: 200Ah (2...

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    Original price $466.99 - Original price $466.99
    Original price
    $466.99
    $466.99 - $466.99
    Current price $466.99
  • Original price $8.19 - Original price $9.99
    Original price
    $8.19 - $9.99
    $8.19 - $9.99
    Current price $8.19

    AJC Battery Compatible with Universal Power Group UB650 6V 4.5Ah UPS Battery

    In stock

    Information 6V SLA AGM | Premier OEM Replacement Battery by AJC® Maintenance-Free AGM Technology: No need to add acid or water, ever. Guaranteed ...

    View full details
    Original price $8.19 - Original price $9.99
    Original price
    $8.19 - $9.99
    $8.19 - $9.99
    Current price $8.19

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.