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<blockquote data-quote="loopkiller" data-source="post: 5673000" data-attributes="member: 601690">They very likely will come with some charge, but checking the voltage is all that is needed. Take your DMM (Digital Multi Meter) and test the voltage of the battery resting without anything connected. It should be above 12.6v out of the box. If it is below 12.6v, you should charge it before using it.A slow charge will never fully charge a large battery. You will only see a small surface charge and the battery will never produce rated power. A fast charge followed by a float charge is necessary.Either your DMM is wack, you don&#039;t know how to use it, or you bought a 16v charger and over charged your batteries. At no time should a 12v charger provide over 15.0v. Your batteries when fully charged should rest between 12.8v and 13.2v, depending on temperature. So if your battery is truly resting at 15.9v like you mentioned above, you are doing something wrong!Quit giving this advice. It is simply wrong.Are you sure you bought a 12 VOLT charger?That would only work for the float charge. You still should have a fast charger as well. Even better would be a charger designed for AGM batteries that will automatically charge the battery properly for you.Or just let your alt do the charging for you. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gifThat is low. You should get that one charged before use.</blockquote>

[QUOTE="loopkiller, post: 5673000, member: 601690"] They very likely will come with some charge, but checking the voltage is all that is needed. Take your DMM (Digital Multi Meter) and test the voltage of the battery resting without anything connected. It should be above 12.6v out of the box. If it is below 12.6v, you should charge it before using it. A slow charge will never fully charge a large battery. You will only see a small surface charge and the battery will never produce rated power. A fast charge followed by a float charge is necessary. Either your DMM is wack, you don't know how to use it, or you bought a 16v charger and over charged your batteries. At no time should a 12v charger provide over 15.0v. Your batteries when fully charged should rest between 12.8v and 13.2v, depending on temperature. So if your battery is truly resting at 15.9v like you mentioned above, you are doing something wrong! Quit giving this advice. It is simply wrong. Are you sure you bought a [B]12 VOLT[/B] charger? That would only work for the float charge. You still should have a fast charger as well. Even better would be a charger designed for AGM batteries that will automatically charge the battery properly for you. Or just let your alt do the charging for you. [IMG]//content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif[/IMG] That is low. You should get that one charged before use. [/QUOTE]

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