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I'd go with Ctek over Battery Tenders for a couple of reasons: All Ctek's have desulfation cycles built into their normal charge profiles, no Battery Tender's do. With sulfating being one of, if not the principal reason batteries die prematurely, regular desulfation capability is a definite plus. Some Ctek models also have "supply" and "recondition" modes as well. "Supply" is the feature mentioned in the recent "Excellence" article about why you should not disconnect the battery on some Porsche models without an alternative power source connected to prevent unintended issues. "Recondition" is used to recover a battery that has been totally discharged; while this will not bring a battery that has run its course back from the grave, it will recover an otherwise good battery that has been mistreated.
Battery Tender is a good basic unit, but there are much better units in the same general price range...............
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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