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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Charging sealed batteries with Alton alternators
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<blockquote data-quote="Monkeypants" data-source="post: 43254" data-attributes="member: 2708"><p>Hi Kevin</p><p></p><p>I worded that bit incorrectly. What I meant to say is that if your charging system maintains your battery in the 12.5 to 13 volt range, as many systems do, then you need to put a larger than recommended Li battery in place. If at the end of your ride the battery is charged to 13 volts with a lead acid battery, you are good to go for your next ride. With a Li battery, you are not, you have a nearly dead battery..</p><p></p><p>A lithium Ion battery at 13 volts has only 30% of it's rated capacity remaining. My first Lithium Ion motorcycle battery was three times the recommended size because I intend to add an e start to that bike. It turns out that this was a good thing, it has about the reserve capacity needed. The second one, which I have had problems with, is the recommended size and it is really too small. I will likely end up changing it or adding a back up sealed battery in the top box.</p><p></p><p>This motorcycle battery review has some good info and cuts thru the manufacturers hype for Li batteries. </p><p></p><p><a href="http://www.advrider.com/forums/showthread.php?t=757934" target="_blank">http://www.advrider.com/forums/showthread.php?t=757934</a></p><p>Scroll down the first page and check out the decline chart. It explains the problems I have been having. If you have magneto igniton and ride in the daytime, you might never experience this, because you barely even use your battery. A few dry cell flashlight batteries in series would more than do the job of running your brake light.</p><p>If you ride at night with a big headlight and electronic or ,worse, points/coil igniton, you need a battery that can take up the slack when the system is discharging at low rpm in town, at stoplights etc. This is when the small amphour Li battery can give you a real problem.</p><p>My other rapide has a chinamo, JG reg at 12 volts and a lead acid battery. It also has a 60 watt H4 headlight and distributor igniton. Coming back from a night ride it will often show 12.5 volts in the battery when checked. This is just fine for that system and has worked well for years. If I switch that battery over to a Li battery and do the same ride, coming home with 12.5 volts, it will fail on the next night ride.</p><p></p><p>Glen</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 43254, member: 2708"] Hi Kevin I worded that bit incorrectly. What I meant to say is that if your charging system maintains your battery in the 12.5 to 13 volt range, as many systems do, then you need to put a larger than recommended Li battery in place. If at the end of your ride the battery is charged to 13 volts with a lead acid battery, you are good to go for your next ride. With a Li battery, you are not, you have a nearly dead battery.. A lithium Ion battery at 13 volts has only 30% of it's rated capacity remaining. My first Lithium Ion motorcycle battery was three times the recommended size because I intend to add an e start to that bike. It turns out that this was a good thing, it has about the reserve capacity needed. The second one, which I have had problems with, is the recommended size and it is really too small. I will likely end up changing it or adding a back up sealed battery in the top box. This motorcycle battery review has some good info and cuts thru the manufacturers hype for Li batteries. [URL]http://www.advrider.com/forums/showthread.php?t=757934[/URL] Scroll down the first page and check out the decline chart. It explains the problems I have been having. If you have magneto igniton and ride in the daytime, you might never experience this, because you barely even use your battery. A few dry cell flashlight batteries in series would more than do the job of running your brake light. If you ride at night with a big headlight and electronic or ,worse, points/coil igniton, you need a battery that can take up the slack when the system is discharging at low rpm in town, at stoplights etc. This is when the small amphour Li battery can give you a real problem. My other rapide has a chinamo, JG reg at 12 volts and a lead acid battery. It also has a 60 watt H4 headlight and distributor igniton. Coming back from a night ride it will often show 12.5 volts in the battery when checked. This is just fine for that system and has worked well for years. If I switch that battery over to a Li battery and do the same ride, coming home with 12.5 volts, it will fail on the next night ride. Glen [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Charging sealed batteries with Alton alternators
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