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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
Lithium Batteries: What You Need To Know
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<blockquote data-quote="mcatrophy" data-source="post: 1212170" data-attributes="member: 3187"><p>With 5 leads, they may well balance the charge in each cell, which in principle is a good idea. But that suggests they fear the cells have different characteristics, and the more fully charged cells would be damaged by extra charging time. Which begs the question of charging on a bike, where there is no provision for charge balancing, and charging current of the order of 20 amps is readily available and likely on a battery that isn't fully charged.</p><p></p><p>And, however they individually select cells to charge, even 20 amps into a fully discharged 12 ampere-hour battery will at best take 12/20 hours or 36 minutes. Even if only one cell is fully discharged. You can't create charge out of thin air.</p><p></p><p>What might be theoretically possible is that they take the 14 volts at 20 amps, convert it to a quarter of the voltage and 4 times the current (3.5 volts, 80 amps) to charge one of the 4 cells. That would be difficult to do cheaply, and 80 amps charging rate might degrade the already bad cell further.</p><p></p><p>I've nothing against Lithium-whatever batteries in principle, I just don't like advertisements that are, at best, misleading.</p></blockquote><p></p>
[QUOTE="mcatrophy, post: 1212170, member: 3187"] With 5 leads, they may well balance the charge in each cell, which in principle is a good idea. But that suggests they fear the cells have different characteristics, and the more fully charged cells would be damaged by extra charging time. Which begs the question of charging on a bike, where there is no provision for charge balancing, and charging current of the order of 20 amps is readily available and likely on a battery that isn't fully charged. And, however they individually select cells to charge, even 20 amps into a fully discharged 12 ampere-hour battery will at best take 12/20 hours or 36 minutes. Even if only one cell is fully discharged. You can't create charge out of thin air. What might be theoretically possible is that they take the 14 volts at 20 amps, convert it to a quarter of the voltage and 4 times the current (3.5 volts, 80 amps) to charge one of the 4 cells. That would be difficult to do cheaply, and 80 amps charging rate might degrade the already bad cell further. I've nothing against Lithium-whatever batteries in principle, I just don't like advertisements that are, at best, misleading. [/QUOTE]
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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
Lithium Batteries: What You Need To Know
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