How To Replace The Batteries On an APC SMARTUPS 1500 Rack Mount

Posted by jdmandell | Posted in Blog | Posted on 17-02-2011-05-2008


    Tools Required:

  • Philips Head Screw Driver
  • Hammer
  • Large Flat Head Screw Driver
  • 4 Replacement batteries of the same model

We would like to start this post by apologizing for the blurry pictures, our tech forgot to take the camera and had to use his cell phone camera, not bad but not too good either.

First step is to power down all of the equipment, most equipment is plugged into the Uninterrupted Power Supply then the UPS is plugged into the wall, so make sure you power down the equipment first, then unplug them from the UPS, then unplug the UPS from the wall. Here we’ve done all that and removed the UPS from the rack. Now you don’t HAVE to remove the UPS from the rack, but in this case it was required.

Here is the top cover, all you need to do is remove the screws on the top and the cover comes off.

With the top cover removed you can see the 4 lead acid batteries that make up the bulk of the UPS, you can also see that the two top batteries have swollen, which is why were replacing the set.

This is a close up of the battery pack showing the swelling, this is usually caused by either over charging, excessive heat or the battery shorting out. Regardless of the cause these guys need to be swapped out.

To remove the battery try all you need to do is remove the 4 screws holding it in, unplug the yellow cable located on the right, and pull the tray out. Our batteries were so swollen however that we had to give them a little “coaxing” in order to get them to slide out. Now if the batteries are not that swollen you don’t even need to remove the UPS from the rack, all you need to do is unpluig everything, take the front cover off and pull the tray out. However with the batteries being as swollen as they were this was not possible in our instance.

This is the battery tray fully removed, you can see the 4 cells along with the wires that connect them. Removing the batteries from the tray however is no easy task since the batteries are double sided taped and or glued to the tray, along with the swelling, this makes removal rather tricky.

There are slits in the back of the tray where you can slip a large flat head screw driver in, and while we don’t normally advise people to work on their computers with a hammer, a few light taps with the hammer should free the battery from the adhesive.

This is the tray without the batteries, now all you need to do is put the new batteries in, connecting the red to red and the black to black

New batteries!

Tray with new batteries back in the UPS, don’t forget to connect the yellow plug.

Here we can see what i mentioned above, the UPS is still in the rack, and all you need to do is pull out the battery tray to do the replacement. Power it back on, check the lights to see if everything is green then your all done.

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