APC UPS Battery Replacement

14 Apr 2021

This short guide provides guidance and images of a APC Uninterruptible power supply (UPS) battery replacement for the model: APC Smart-UPS SMT - Uninterruptible Power Supply 750VA Rackmount 2U - SMT750RMI2U

WARNING: Please take care when working with batteries as there is a risk of electric shock!!

If you purchase the official APC battery pack then you do not need to remove the stickers or wiring as you are purchasing a complete unit, but I found I can purchase a set of Yuasa batteries for roughly £30 in comparison to the kit which sells for roughly £90.

The process was relatively quick and easy to achieve, I used some Gorilla tape to reapply the sticker as it lost some adhesive and I wanted to be sure I could pull the batteries back out again when required.

  1. Remove the front panel and release the thumb screwed battery cover.

    ups_battery_remove_cover

  2. Use the tapes to pull the battery out, this automatically disconnected the unit.

    ups_battery_pullout

  3. Remove the sticker from both sides and disconnect the power cables, black (negative) first then red (positive).

    ups_battery_remove_stickers_disconnect

  4. Connect the new batteries in the same configuration.

    ups_battery_reconnect_cables

  5. Reapply the sticker, using some tape on the sides to ensure you can pull it back out later.

    ups_battery_tape_sticker

  6. Replace the battery cover and front panel, reconnect power and check the front panel display.

    ups_battery_100_working

This UPS is part of a learning lab containing:

I hope you have found this helpful.

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