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post #1 of 15 (permalink) Old 09-10-2018, 10:28 AM Thread Starter
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Lithium ion batteries

Thinking about going with a lithium ion battery on my 2015 RGS. does anyone know if the voltage regulator needs to be upgraded from stock or not? any info would be appreciated. THX
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post #2 of 15 (permalink) Old 09-10-2018, 10:32 AM
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following, been wondering same.


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post #3 of 15 (permalink) Old 09-10-2018, 12:11 PM
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Originally Posted by moonhd02 View Post
Thinking about going with a lithium ion battery on my 2015 RGS. does anyone know if the voltage regulator needs to be upgraded from stock or not? any info would be appreciated. THX
The correct answer is that they need revised charging rates and dedicated cooling.

The answer that passes out in the world is no, just replace the lead battery and ride on.

I have seen a couple of custom scooters that burned up from them, but being customs, who knows what they were actually wired up like. Both did have the oil bag wrapped around the battery.


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post #4 of 15 (permalink) Old 09-10-2018, 12:16 PM
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the thought of thermal runaway on a motorcycle scares the bejeezes outta me.

so much unregulated crap coming out of china these days i'll let someone else be the guinea pig...
or bacon lol
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post #5 of 15 (permalink) Old 09-10-2018, 12:47 PM
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Iíve been running with a Lithium battery in my Softail and my wifeís Sportster for a few years. I doubt I would go that route again. Yeah, they are very lightweight. But they do require a special charger that can handle a Lithium battery. The bikes arenít modified and handle them well. My Softail doesnít mind the Lithium as much as the Sportster does. They drain down much quicker in off weeks of no use. You simply have to keep a Lithium tender on the bike if you donít plan on riding for a few weeks. The Softail will kill the battery in two to three months while the Sportster will do it in 6 weeks. The security system uses some power and the lithiums just canít take that long term draw like a lead-acid can. Other than the storage issue, the bikes donít care. The motors spin over easy, plenty of cranking speed. Letís be honest, I canít feel any weight difference on the bikes either. They are also expensive. More so than a lead-acid or gell-cell.

So for me, I probably wonít do them again. The benefits (weight and charge/recovery time) donít overcome the drawbacks.
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post #6 of 15 (permalink) Old 09-10-2018, 06:51 PM
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Over on chopped baggers thereís some stories of....well duh, Chopped baggers catching and nearly catching fire. My battery is a bitch to get out. My ecu sits on top of my battery along with my alarm proximity sensor and target tune module. Thatís a lot to deal with if youíre trying to get a smoking battery out of your scooter and if you dint thatís a lot of money ďup in smokeĒ. Not worth it to me. Iíll stick with the stocker....or maybe an odyssey or Optima gel cell.....Maybe.


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post #7 of 15 (permalink) Old 09-10-2018, 08:53 PM
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Iíve been using Odessey batteries for many years. Longer lasting (10 years) in one of my bikes and no altering of the bike required. They are designed for vibration prone uses. A few more bucks on purchase but way longer lasting. And I charge them once maybe twice a winter. I never use a trickle charge on them as they require more amperage to actually charge then those 500mA chargers. Even on long periods of no use, they crank right over and start. Very slow to drop voltage over time.


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post #8 of 15 (permalink) Old 09-10-2018, 09:44 PM
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My '10 Moto Guzzi Cafe Classic came with a Lithium Iron battery. It felt like an empty case it was so light. I didn't want to buy the special charger so the battery died after 3 years. I only see the advantage for race bikes that are saving every ounce. I like sealed AGM batteries just fine.
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post #9 of 15 (permalink) Old 09-10-2018, 11:12 PM
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I run a Ballistic brand Lithium battery in my Hayabusa. It’s small lightweight and has a ton of CCA’s. With that being said I would never run 1 in my Roadglide......

These lithium batteries don’t do well hooked up to a bike that has a parasitic drain like a H-D alarm system. So I could see how a Harley could kill a battery sitting in a garage for an extended period of time. Also with lithium’s once it completely drains those cells go bad and there’s no recharging them properly. I’ve never ran my Hayabusa for 8-10 + hours straight so I don’t know if any problems would arise from that?

When I’m not riding my Hayabusa I remove the battery and store it inside my house. I charge it up occasionally using the special required charger. The battery has lasted me over 6 years but like I mentioned it from limited use. These type of batteries are great for race bikes or cafe/custom builds where you don’t have a lot of room for a battery but not for a touring day to day style heavy Harley. 10lb difference in a 900lb+ Motorcycle won’t amount to much

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post #10 of 15 (permalink) Old 09-11-2018, 12:28 AM
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I have run a Antigravity LI battery on my bike for years. Crazy cranking on my 124 that makes it start like a Honda. Absolutely love it and will always run one. never has an issue, didn't change anything to install.
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