Motomaster Battery Charger 111567 Manual Verified Link -

: Always allow a frozen battery to thaw in a warm area before connecting the charger. Location matters

: A built-in feature allows for the restoration of older or sulfated batteries by attempting to break down internal lead-sulfate crystals. Step-by-Step Operating Instructions motomaster battery charger 111567 manual verified

The battery may be too discharged (

If you try to crank for 10+ seconds, the charger's internal thermal breaker will shut it down for 15-30 minutes. This is a protection feature, not a defect. : Always allow a frozen battery to thaw