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<blockquote data-quote="ahole-ic" data-source="post: 7200186" data-attributes="member: 619324">Here is a little electronics lesson for everyone but bubba and sexy(you guys have it dead on)... A voltage (aka difference of potential) is required to make current flow. If a battery is at 12.6v and an alternator is in parallel with it at 14.4v, there is a 1.8v difference of potential between the alt and the batt and so the current can ONLY flow out of the alt to the batt. Once another device is connected in parallel, ALL CURRENT flows out of the alternator, because it is the highest source of potential in the circuit. The battery remains charging from the alt and not discharging. Once the current drawn causes the alternator to drop its voltage, and that voltage gets to the battery voltage, the battery will begin discharging.Unless the battery is discharging, IT IS ALWAYS CHARGING(aka drawing current from the alternator)This is BASIC electronics and it is not disputable. Take it to heart. Stop recommending batteries to &quot;stop voltage drop&quot;. It cannot and never has done that. The ONLY thing batteries help with is keeping the voltage above 12v so the amps don&#039;t blow. That&#039;s it. They don&#039;t &quot;stop dimming&quot; etc.</blockquote>

[QUOTE="ahole-ic, post: 7200186, member: 619324"] Here is a little electronics lesson for everyone but bubba and sexy(you guys have it dead on)... A voltage (aka difference of potential) is required to make current flow. If a battery is at 12.6v and an alternator is in parallel with it at 14.4v, there is a 1.8v difference of potential between the alt and the batt and so the current can ONLY flow out of the alt to the batt. Once another device is connected in parallel, ALL CURRENT flows out of the alternator, because it is the highest source of potential in the circuit. The battery remains charging from the alt and not discharging. Once the current drawn causes the alternator to drop its voltage, and that voltage gets to the battery voltage, the battery will begin discharging. Unless the battery is discharging, IT IS ALWAYS CHARGING(aka drawing current from the alternator) This is BASIC electronics and it is not disputable. Take it to heart. Stop recommending batteries to "stop voltage drop". It cannot and never has done that. The ONLY thing batteries help with is keeping the voltage above 12v so the amps don't blow. That's it. They don't "stop dimming" etc. [/QUOTE]

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