The batteries in a FERRUPS typically last 3-6 years depending on how many power outages you have, how much heat there is, etc. So, 3 months doesn't sound right. Hopefully, you are buying batteries from a reputable source. Eaton bought Powerware about 6 years ago and retained their service network which has lots of techs trained on the FERRUPS. I suggest you contact them:
Toll Free: 1 800 356 5737
E-mail: [email protected]
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