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Message: <blockquote data-quote="airshot" data-source="post: 497421" data-attributes="member: 1183"><p>First off I hope your using a digital voltmeter and not the dash voltmeter on your boat.  For 12v DC batteries you need to be 12.6 volts or above to be a full charge!  At 11.98 you are almost dead. Normally you need 12.2 volts to get a motor started. Try a regular charger without the battery hooked up to anything and see if it charges fully.  I always take a digital volt meter with me when I buy a battery, often had to go thru a number of " new" batteries to get a good one !!  To each his own, but from all the different battery brands I have used in my 60 boating years, Interstate have been the worse, with walmart being better....DieHard were rhe best for me, back when they were made well, but that hasnt been the case now for many years!!</p></blockquote><p></p>