When you lift your foot off the gas or hit the brakes and voltage climbs up into the 14s from some point well below that, your vehicle is sacrificing battery life for a miniscule amount of extra MPG. Even though the energy required to recycle lead acid batteries is way way greater than any fuel efficiency gained. But that MPG number going up a tiny fraction means they are rewarded. This is an attempt to get those epa MPG numbers up a smidge, and this is a battery killer.Ī fully charged battery cannot accept much amperage, so this minor regenerative braking scheme in the quest for a smidge more MPG, requires the battery be dischrged to the point it can accept higher amperage when the system voltage is increasedĪutomakers do not care about battery life. It is said each 25 amps that the alternator produces requires 1 engine HP. Many modern vehicles will attempt to keep the battery at 80% charged or less, so that when one lifts their foot off the gas to coast or brake, the depleted battery can duck up 20 to 50 amps when the voltage regulator controlling alternator output seeks mid 14's. The Worst constructed battery kept fully charged will last longer than the best battery chronically undercharged. You want a battery to last? Charge it regularly to full or nearly so by plugging it into a 'smart' charger, even though these too do not hold the ideal voltage for long enough. Your vehicle does not come close to holding it at ideal voltages, even if you were to drive it 3.5 hours. One cant charge an 80% charged battery to 100% in less than 3.5 hours and that is when it is held at at ideal voltages. Nowadays higher parasitic loads on vehicles can deep cycle a starter battery, which they do not enjoy as all lead acid batteries always want to be kept cool, and fully charged. Max profit mentality means they are built so that the higher percentage will likely last the warranty period. What's the new battery tech being pushed on us? AGM is still lead acid. Removing these components from the retail streams alone would be a benefit.Īs a subsequence, we're enduring the industry "sabotage" the old tech batteries in order to induce us into embracing the new.Įdit: Where on a battery does one look to see who made it? Besides furthering the sale of newly discovered science, the industry can greatly reduce the necessary handling of lead and acid. I believe the big money is all behind the new battery technologies and would love to see FLA's simply go away. Here goes: We all know flooded lead acid batteries are a holdover from the 19th Century. No points given for saying I have no proof because I already said that. It's a hunch and I'm sharing it with you. I have a hunch about the long running and increasing occurrences of ridiculously short battery life.
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