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<blockquote data-quote="ahole-ic" data-source="post: 7359469" data-attributes="member: 619324">It&#039;s the same principle as capacitors, only worse with batteries. ALL CURRENT IS DRAWN FROM THE HIGHEST SOURCE OF POTENTIAL in a parallel circuit. Since the alternator is charging everything else, it is the highest source of potential. Nothing could ever be higher than it, and only a capacitor can be AS high as it. A battery will charge up to around 12.8 - 12.9. It will float higher than that. Measuring your battery right after shutting off the engine or taking it off of the charger, you will see a voltage in the 13&#039;s. Now, give your stereo one solid burp. It doesn&#039;t have to be all the way up. Just something to draw a little current. Now measure again.Just a few amps drawn, will take that float charge away (so will just sitting for 24 hrs) as it&#039;s just a tiny charge above the resting voltage. You will now see that you&#039;re around 12.8v. This is because that&#039;s actually the maximum the battery can charge up to. Since that&#039;s it&#039;s voltage, the source voltage has to drop below this for the battery to begin discharging. So, until the voltage drops that low, the battery is charging. This makes it a parasitic drain on the alternator at all times until it discharges. For this reason, a battery cannot cure voltage drop unless your old battery was just bad and had an excessive parasitic drain. ALL battery banks do is hold the voltage above 12v. They are there to protect your amplifier from being exposed voltage drops where your alternator cannot meet the demand. ---------- Post added at 03:40 PM ---------- Previous post was at 03:40 PM ---------- No.</blockquote>

[QUOTE="ahole-ic, post: 7359469, member: 619324"] It's the same principle as capacitors, only worse with batteries. ALL CURRENT IS DRAWN FROM THE HIGHEST SOURCE OF POTENTIAL in a parallel circuit. Since the alternator is charging everything else, it is the highest source of potential. Nothing could ever be higher than it, and only a capacitor can be AS high as it. A battery will charge up to around 12.8 - 12.9. It will float higher than that. Measuring your battery right after shutting off the engine or taking it off of the charger, you will see a voltage in the 13's. Now, give your stereo one solid burp. It doesn't have to be all the way up. Just something to draw a little current. Now measure again. Just a few amps drawn, will take that float charge away (so will just sitting for 24 hrs) as it's just a tiny charge above the resting voltage. You will now see that you're around 12.8v. This is because that's actually the maximum the battery can charge up to. Since that's it's voltage, the source voltage has to drop below this for the battery to begin discharging. So, until the voltage drops that low, the battery is charging. This makes it a parasitic drain on the alternator at all times until it discharges. For this reason, a battery cannot cure voltage drop unless your old battery was just bad and had an excessive parasitic drain. ALL battery banks do is hold the voltage above 12v. They are there to protect your amplifier from being exposed voltage drops where your alternator cannot meet the demand. [COLOR=Silver] [/COLOR] [COLOR=Silver][SIZE=8px]---------- Post added at 03:40 PM ---------- Previous post was at 03:40 PM ----------[/SIZE][/COLOR][SIZE=8px][/SIZE] [COLOR=Silver] [/COLOR] No. [/QUOTE]

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