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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 750 BAT-0062 9Ah 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power LI 750 BAT-0062 9Ah 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 750 BAT-0062 9Ah UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maint...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power LI 12V 10Ah UPS Replacement Battery
    $37.49 - $37.49
    $37.49
    $37.49 - $37.49
    $37.49

    Best Power LI 12V 10Ah UPS Replacement Battery

    In stock

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

    View full details
    $37.49 - $37.49
    $37.49
    $37.49 - $37.49
    $37.49
  • Best Power Patriot 425 UPS 12V 8Ah UPS Replacement Battery
    $29.19 - $29.19
    $29.19
    $29.19 - $29.19
    $29.19

    Best Power Patriot 425 UPS 12V 8Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Patriot 425 UPS UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenan...

    View full details
    $29.19 - $29.19
    $29.19
    $29.19 - $29.19
    $29.19
  • Best Power LI 12V 12Ah UPS Replacement Battery
    $38.69 - $38.69
    $38.69
    $38.69 - $38.69
    $38.69

    Best Power LI 12V 12Ah UPS Replacement Battery

    In stock

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

    View full details
    $38.69 - $38.69
    $38.69
    $38.69 - $38.69
    $38.69
  • Best Power Patriot 280 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power Patriot 280 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Patriot 280 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 250 12v 7ah 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 250 12v 7ah 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 250 12v 7ah 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 Patriot Pro 750 II 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power Patriot Pro 750 II 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Patriot Pro 750 II UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainte...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power Fortress LI 520 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power Fortress LI 520 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Fortress LI 520 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenan...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power PW9155-12-64 one UPS-64 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power PW9155-12-64 one UPS-64 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power PW9155-12-64 one UPS-64 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely M...

    View full details
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19
  • Best Power 420 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 420 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 420 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 250 (12v 7ah) 12V 9Ah UPS Replacement Battery
    $32.19 - $32.19
    $32.19
    $32.19 - $32.19
    $32.19

    Best Power 250 (12v 7ah) 12V 9Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 250 12v 7ah 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 PW9120 one BAT-1500 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power PW9120 one BAT-1500 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power PW9120 one BAT-1500 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maint...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power PW9120 one BAT-700 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power PW9120 one BAT-700 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power PW9120 one BAT-700 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainte...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power LI 750 Rackmount 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power LI 750 Rackmount 12V 7Ah UPS Replacement Battery

    In stock

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

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power Patriot 600 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power Patriot 600 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Patriot 600 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance f...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power LI 750 BAT-0062 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power LI 750 BAT-0062 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 750 BAT-0062 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenan...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power Fortress II LI 2250 6V 12Ah UPS Replacement Battery
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99

    Best Power Fortress II LI 2250 6V 12Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Fortress II LI 2250 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maint...

    View full details
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99
  • Best Power Middle Atlantic Select Series UPS 500VA UPS-S500R 6V 7Ah UPS Replacement Battery
    $15.39 - $15.39
    $15.39
    $15.39 - $15.39
    $15.39

    Best Power Middle Atlantic Select Series UPS 500VA UPS-S500R 6V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Middle Atlantic Select Series UPS 500VA UPS-S500R UPS Battery Exact OEM replacement guaranteed to ...

    View full details
    $15.39 - $15.39
    $15.39
    $15.39 - $15.39
    $15.39
  • Best Power Middle Atlantic Select Series UPS 1000VA UPS-S1000R 6V 7Ah UPS Replacement Battery
    $15.39 - $15.39
    $15.39
    $15.39 - $15.39
    $15.39

    Best Power Middle Atlantic Select Series UPS 1000VA UPS-S1000R 6V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Middle Atlantic Select Series UPS 1000VA UPS-S1000R UPS Battery Exact OEM replacement guaranteed t...

    View full details
    $15.39 - $15.39
    $15.39
    $15.39 - $15.39
    $15.39
  • Best Power LI 950 6V 12Ah UPS Replacement Battery
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99

    Best Power LI 950 6V 12Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 950 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free A...

    View full details
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99
  • Best Power LI 2250 6V 12Ah UPS Replacement Battery
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99

    Best Power LI 2250 6V 12Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 2250 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free ...

    View full details
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99
  • Best Power 250 12V 5Ah UPS Replacement Battery
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99

    Best Power 250 12V 5Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power 250 UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Maintenance free AGM ...

    View full details
    $19.99 - $19.99
    $19.99
    $19.99 - $19.99
    $19.99
  • Best Power Middle Atlantic Select Series UPS 1500VA UPS-S1500R 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power Middle Atlantic Select Series UPS 1500VA UPS-S1500R 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power Middle Atlantic Select Series UPS 1500VA UPS-S1500R UPS Battery Exact OEM replacement guaranteed t...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99
  • Best Power LI 750 Fortress RM 12V 7Ah UPS Replacement Battery
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

    Best Power LI 750 Fortress RM 12V 7Ah UPS Replacement Battery

    In stock

    Info AJC® replacement compatible with Best Power LI 750 Fortress RM UPS Battery Exact OEM replacement guaranteed to fit easily and precisely Mainte...

    View full details
    $23.99 - $23.99
    $23.99
    $23.99 - $23.99
    $23.99

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.