Thanks all!Įveryone wrote:Don't mix batteries of multiple ages! After it went through its detection phase, everything checked out okay and it was satisfied with the batteries. I've attached a screenshot of PowerChute.ĮDIT: After all of the strong recommendations against mixing battery ages, I bought two more batteries, replaced the old ones, and put the tray back in the chassis. Before I pull the main plug as a test, I want to make sure there's not anything else I can check. I plugged a USB cable between it and one of the servers, installed PowerChute, and it claims that the battery needs to be replaced, but that it also has 38 minutes of runtime available. Any thoughts on why the UPS is having a fit? Should we just buy two additional brand new batteries? Or maybe check w/ the UPS to see if it has anything else going on with it? I swapped out the two "old but good" batteries w/ the 7A batteries, but still get the same error. Those were 12v / 8A batteries, and I had a couple good 12v / 7A batteries. I went back to Batteries Plus, and they verified all 4 batteries seemed good. Using a multimeter to touch the two prongs of the plug shows an output of 25v. I pulled the tray, checked the connections, and everything seemed good. I updated the battery installation date on the interface at the front of the UPS, and then it started warning again to replace the battery. I bought two replacement batteries, hooked them up, and installed the tray back into the chassis. I pulled the battery tray, went to Batteries Plus, and after testing the 4 batteries, they found that 2 of them were bad and the other 2 were still in good condition, using some ~$700 device to check the cell health. Our rack-mounted Smart-UPS 1500 started beeping at us recently, with "replace battery" displayed on the little LCD.
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