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BatteryClerk Prime FAST 1-2 day shipping to most of Canada
BatteryClerk Prime FAST 1-2 day shipping to most of Canada

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!

  • Best Power LI 1.8KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power LI 1.8KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 1.8KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance fre...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power LI 1.7KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power LI 1.7KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 1.7KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance fre...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power Fortress LI 2.5KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power Fortress LI 2.5KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Fortress LI 2.5KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainte...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power FERRUPS FER-4.3K 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power FERRUPS FER-4.3K 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS FER-4.3K UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintena...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power FERRUPS FER 3.1KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power FERRUPS FER 3.1KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS FER 3.1KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainte...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power FERRUPS FE 4.3KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power FERRUPS FE 4.3KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS FE 4.3KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainten...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power 850VA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Power 850VA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 850VA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free AG...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Power FERRUPS ME 1.4KVA 12V 75Ah UPS Replacement Battery
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59

    Best Power FERRUPS ME 1.4KVA 12V 75Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS ME 1.4KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainten...

    View full details
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59
  • Best Power FERRUPS FE 5.3KVA 12V 75Ah UPS Replacement Battery
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59

    Best Power FERRUPS FE 5.3KVA 12V 75Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS FE 5.3KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainten...

    View full details
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59
  • Best Power FERRUPS FE 1.8KVA 12V 75Ah UPS Replacement Battery
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59

    Best Power FERRUPS FE 1.8KVA 12V 75Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS FE 1.8KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainten...

    View full details
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59
  • Best Power FERRUPS FE 1.4KVA 12V 75Ah UPS Replacement Battery
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59

    Best Power FERRUPS FE 1.4KVA 12V 75Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FERRUPS FE 1.4KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainten...

    View full details
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59
  • Best Power FD 5.3KVA 12V 75Ah UPS Replacement Battery
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59

    Best Power FD 5.3KVA 12V 75Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power FD 5.3KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance fre...

    View full details
    $254.59 - $254.59
    $254.59
    $254.59 - $254.59
    $254.59
  • Best Power 2000 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 2000 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 2000 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free AGM...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power 3000 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 3000 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 3000 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free AGM...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power UPS-OLEBPR-2 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power UPS-OLEBPR-2 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power UPS-OLEBPR-2 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance ...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power UPS-OLRBP-1 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power UPS-OLRBP-1 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power UPS-OLRBP-1 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power 1500 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 1500 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 1500 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free AGM...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power LI 1050 Fortress 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power LI 1050 Fortress 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 1050 Fortress UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintena...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power UPS-OLRBP-3 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power UPS-OLRBP-3 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power UPS-OLRBP-3 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power UPS-OLRBP-4 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power UPS-OLRBP-4 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power UPS-OLRBP-4 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power 1000 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 1000 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 1000 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free AGM...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power LI 1050 Fortress RM 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power LI 1050 Fortress RM 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 1050 Fortress RM UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maint...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power LI 750 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power LI 750 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 750 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free A...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power Patriot II Pro 400 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power Patriot II Pro 400 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Patriot II Pro 400 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainte...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

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.