Battery Health-Volt Meter
10-15-2021, 11:23 AM
#16
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It's worth noting that given the context in this thread, none of these things you have mentioned are actually happening.
Drawing 50a? That's a serious short, and the battery would discharge in a matter of hours (and also get quite warm). The car would require a ludicrous amount of current to jumpstart after the battery flatlines with this type of damage, more than a consumer grade Schumacher can put out, and more than most passenger vehicles would be able to supply over common 6 gauge jumper cables.
Voltage anomalies during the flash... this is the only sort of legitimate concern, and is alleviated by hooking up a charger (recommended because someone out there played with their headlights too much and bricked their ECU once). If there is an intermittent high electrical load happening independent of the user, then yes, voltage will fluctuate unpredictably and this could cause the ECU to shutdown mid-flash.
A lead-acid battery will not self-reverse its polarity, full stop. The main way to reverse the polarity of a car battery is to discharge it then cram a ton of power into it backwards. The other ways involve numerous stars aligning and the perfect storm of repetitive user error that will give the illusion of the battery reversing its own polarity. Further, given the myriad of electrical systems in modern vehicles employing a diode in their power circuits as a basic means of protection, if the battery were to somehow have its polarity reversed, the dash would either be going bonkers about half of the modules not responding, or more likely it would be completely off because of the aforementioned diode-based protection, all assuming the car would even run.
More likely than these scenarios is that OP's charger is on its way out, either in its circuitry or the clamps themselves have a fraying connection someone on the wiring.
Drawing 50a? That's a serious short, and the battery would discharge in a matter of hours (and also get quite warm). The car would require a ludicrous amount of current to jumpstart after the battery flatlines with this type of damage, more than a consumer grade Schumacher can put out, and more than most passenger vehicles would be able to supply over common 6 gauge jumper cables.
Voltage anomalies during the flash... this is the only sort of legitimate concern, and is alleviated by hooking up a charger (recommended because someone out there played with their headlights too much and bricked their ECU once). If there is an intermittent high electrical load happening independent of the user, then yes, voltage will fluctuate unpredictably and this could cause the ECU to shutdown mid-flash.
A lead-acid battery will not self-reverse its polarity, full stop. The main way to reverse the polarity of a car battery is to discharge it then cram a ton of power into it backwards. The other ways involve numerous stars aligning and the perfect storm of repetitive user error that will give the illusion of the battery reversing its own polarity. Further, given the myriad of electrical systems in modern vehicles employing a diode in their power circuits as a basic means of protection, if the battery were to somehow have its polarity reversed, the dash would either be going bonkers about half of the modules not responding, or more likely it would be completely off because of the aforementioned diode-based protection, all assuming the car would even run.
More likely than these scenarios is that OP's charger is on its way out, either in its circuitry or the clamps themselves have a fraying connection someone on the wiring.
