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Battery talk
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<blockquote data-quote="ChopTop84" data-source="post: 1530330" data-attributes="member: 19210"><p>Your standard, 12v lead acid car battery should have a resting voltage of 12.6 or higher to be considered fully charged and ready to go.</p><p></p><p>For every .2 volts below that, kiss about 25% of your charge goodbye. So 12.4 would be 75%, down to 11.8 being 0% charged.</p><p></p><p>Those are readings pulled from a "resting" battery. A resting battery is one that has been charged and then left to sit for 24 hours, or had a significant load put on them to suck off the surface charge. (high beams for 1 minute usually take care of the surface charge). </p><p></p><p>Stand alone load testers work also, as they basically put a heavy load on the battery and see how it recovers.</p><p></p><p>If your battery is 10.5 or less at rest, I would be concerned that you have a dead/shorted or sulfated cell, and your not likely to get any good life out of it.</p><p></p><p>Sealed batteries dont like big chargers! If you overheat them while charging, you will boil off your electrolyte. If your lucky, the battery will just vent acid all over the place. if your not lucky, it will blow up.</p><p></p><p>Had a guy at the boat yard put our big jump box on a gel cell optima type and walked away. There wasnt much left of it half an hour later. It vented and melted down.</p><p></p><p>Personally? I would donate yours to some kid with a dead power wheels, otherwise, scrap it.</p></blockquote><p></p>
[QUOTE="ChopTop84, post: 1530330, member: 19210"] Your standard, 12v lead acid car battery should have a resting voltage of 12.6 or higher to be considered fully charged and ready to go. For every .2 volts below that, kiss about 25% of your charge goodbye. So 12.4 would be 75%, down to 11.8 being 0% charged. Those are readings pulled from a "resting" battery. A resting battery is one that has been charged and then left to sit for 24 hours, or had a significant load put on them to suck off the surface charge. (high beams for 1 minute usually take care of the surface charge). Stand alone load testers work also, as they basically put a heavy load on the battery and see how it recovers. If your battery is 10.5 or less at rest, I would be concerned that you have a dead/shorted or sulfated cell, and your not likely to get any good life out of it. Sealed batteries dont like big chargers! If you overheat them while charging, you will boil off your electrolyte. If your lucky, the battery will just vent acid all over the place. if your not lucky, it will blow up. Had a guy at the boat yard put our big jump box on a gel cell optima type and walked away. There wasnt much left of it half an hour later. It vented and melted down. Personally? I would donate yours to some kid with a dead power wheels, otherwise, scrap it. [/QUOTE]
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