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I have an optimate pro4-s, it charges with proper voltage on std setting(13.8 volts). On AGM it registers 16.5-17.2 when first connected. Is this normal or a defect of the charger. I am afraid to leave it on AGM for any length of time. Also the fan runs when on AGM. Submitted on 5-6-2021 at 18:50
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