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  • RTec88 commented on Surferdude's instructable Rework a UPS with Massive Capacity1 month ago
    Rework a UPS with Massive Capacity

    I modified an APC350 using a car battery with a 600CCA rating, just over 3 years ago. This unit runs on one of our shop computers, 5 days/wk - 24/7. Our area is prone to blackouts from 5-10 times per year on average and this "baby" never overheats and the battery still passes it's load test. I've never tested the true amount of time this UPS can keep our shop system running, until it dies but the longest power outage I've witnessed at 40 minutes and it was running just fine!

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