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Either scrap or have them rebuilt at a local battery shop that provides that service. Sometimes it cheaper to have the cells replaced. Sound like they both have at least one bad cell, or the charger is malfunctioning

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Q: I have two 18 Volt batteries from a DeWalt circular saw kit 1 will not charge to 18 V only 16.32 V. 2 looses charge with no load. Should I scrap them?
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