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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Battery weak after ride - C Rapide
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<blockquote data-quote="Monkeypants" data-source="post: 47112" data-attributes="member: 2708"><p>I would do lots of research before buying a LiFePo4 battery such as a Shorai or Ballistic. I have owned two and have gone back to conventional lead acid.</p><p>The Li batteries are not designed to work with our antiquated charging systems, or even an upgraded system such as a Alton.</p><p>With the Ballistic, the warranty is void if the voltage has ever been pulled below 13 volts. When pulled below this voltage an electronic telltale is left behind.</p><p></p><p>My $170 Ballistic lasted just 18 months. It is still under partial warranty, but there is no point on acting on it as I know the system has seen less than 13 volts, in fact the resting voltage on that system is generally around 12.8, or lower after a night run.</p><p></p><p>It was suggested to me that a third Li Battery brand called Deltran might be better suited to the job.. I contacted the Deltran and learned that my problems with the Ballistic batteries are to be expected in this type of electrical system. Li batteries work best in modern hi output systems that run to 14.5 volts and produce a positive charge even with lights on at idle. I asked if Deltran LiFePo4 batteries (same type as Ballistic and Shorai) would live OK at 12.5 to 13 volts, which is where most of these old systems tend to run. Here is the answer: Hello Glen,</p><p></p><p> </p><p></p><p>Unfortunately the answer to your question is no. Nobody’s 12.8V LiFePO4 battery will work in that situation. These batteries need to see at least 13.6V to maintain a full charge. Anything below that will not ever charge the battery to 100%. You end up with much less capacity that you need. The state of charge of a LiFePO4 battery sitting at 13V is only 30%. At 12.75V it is only 10% charged.</p><p></p><p> </p><p></p><p>Lead acid batteries are your best bet because your system’s voltage is just enough to keep them fairly charged.</p><p></p><p> </p><p></p><p>Best regards,</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 47112, member: 2708"] I would do lots of research before buying a LiFePo4 battery such as a Shorai or Ballistic. I have owned two and have gone back to conventional lead acid. The Li batteries are not designed to work with our antiquated charging systems, or even an upgraded system such as a Alton. With the Ballistic, the warranty is void if the voltage has ever been pulled below 13 volts. When pulled below this voltage an electronic telltale is left behind. My $170 Ballistic lasted just 18 months. It is still under partial warranty, but there is no point on acting on it as I know the system has seen less than 13 volts, in fact the resting voltage on that system is generally around 12.8, or lower after a night run. It was suggested to me that a third Li Battery brand called Deltran might be better suited to the job.. I contacted the Deltran and learned that my problems with the Ballistic batteries are to be expected in this type of electrical system. Li batteries work best in modern hi output systems that run to 14.5 volts and produce a positive charge even with lights on at idle. I asked if Deltran LiFePo4 batteries (same type as Ballistic and Shorai) would live OK at 12.5 to 13 volts, which is where most of these old systems tend to run. Here is the answer: Hello Glen, Unfortunately the answer to your question is no. Nobody’s 12.8V LiFePO4 battery will work in that situation. These batteries need to see at least 13.6V to maintain a full charge. Anything below that will not ever charge the battery to 100%. You end up with much less capacity that you need. The state of charge of a LiFePO4 battery sitting at 13V is only 30%. At 12.75V it is only 10% charged. Lead acid batteries are your best bet because your system’s voltage is just enough to keep them fairly charged. Best regards, [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Battery weak after ride - C Rapide
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