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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 Technologies Fortress LI460VA B 12V 5Ah UPS Replacement Battery
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99

    Best Technologies Fortress LI460VA B 12V 5Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies Fortress LI460VA B UPS Battery Exact OEM replacement guaranteed to fit easily and precisely...

    View full details
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99
  • Best Technologies UT5K 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies UT5K 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies UT5K UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies UT4K 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies UT4K 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies UT4K UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies UT3K 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies UT3K 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies UT3K UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

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

    Best Technologies 4.3KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 4.3KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

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

    Best Technologies 3.1KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 3.1KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 2KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 2KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 2KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 2.1KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 2.1KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 2.1KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 1KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 1KVA 12V 35Ah UPS Replacement Battery

    In stock

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

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 1.5KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 1.5KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 1.5KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 5.0KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 5.0KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 5.0KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 3.0KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 3.0KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 3.0KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

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

    Best Technologies 2.5KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 2.5KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 2.0KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 2.0KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 2.0KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 1.8KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 1.8KVA 12V 35Ah UPS Replacement Battery

    In stock

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

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

    Best Technologies 1.7KVA 12V 35Ah UPS Replacement Battery

    In stock

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

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 1.15KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 1.15KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 1.15KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenanc...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 10KVA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 10KVA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 10KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance ...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies BAT-0065 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies BAT-0065 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies BAT-0065 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenan...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies BAT-0053 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies BAT-0053 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies BAT-0053 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenan...

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

    Best Technologies 850VA 12V 35Ah UPS Replacement Battery

    In stock

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

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 700VA 12V 35Ah UPS Replacement Battery
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29

    Best Technologies 700VA 12V 35Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 700VA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance ...

    View full details
    $109.29 - $109.29
    $109.29
    $109.29 - $109.29
    $109.29
  • Best Technologies 1420 Fortress 12V 18Ah UPS Replacement Battery
    $57.19 - $57.19
    $57.19
    $57.19 - $57.19
    $57.19

    Best Technologies 1420 Fortress 12V 18Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 1420 Fortress UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mai...

    View full details
    $57.19 - $57.19
    $57.19
    $57.19 - $57.19
    $57.19
  • Best Technologies 1.3KVA 12V 18Ah UPS Replacement Battery
    $57.19 - $57.19
    $57.19
    $57.19 - $57.19
    $57.19

    Best Technologies 1.3KVA 12V 18Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Technologies 1.3KVA UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance...

    View full details
    $57.19 - $57.19
    $57.19
    $57.19 - $57.19
    $57.19

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.