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Plugging 18v battery onto charger....it goes into pre charge mode (no lights) and stays there. Won't charge. Good power to charger and same results with two different batteries.

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Either all of these batteries are at end-of-life or the charger internals are defective. Try a known-good battery first, then look into the charger with a voltmeter. The charger should deliver several volts higher than the rated voltage of the battery when the battery is inserted.

Posted on Feb 02, 2010

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